RE: [nfc-l] Night Migrating Raptors
"Circus-Gulf" brought to you by the overly capable auto correction program of Apple Computer. John C. Arvin Research Associate Gulf Coast Bird Observatory 103 West Hwy 332 Lake Jackson, TX 77566 jar...@gcbo.org www.gcbo.org Austin, Texas From: "John Arvin" Sent: Monday, March 05, 2012 9:58 AM To: "Christopher T. Tessaglia-Hymes" , "Kenneth Victor Rosenberg" , "Benjamin Van Doren" Subject: RE: [nfc-l] Night Migrating Raptors There is a substantial (and still increasing) breeding population of Swallow-tailed Kites in the western Gulf states that were not sampled by the Zimmermann thesis. These seem to be circus-Gulf migrants, at least in part. All reports of STKI from Texas so far this spring have been from Galveston eastward and would seem to be trans-Gulf migrants. The circus-Gulf movement comes a bit later and continues into May. John C. Arvin Research Associate Gulf Coast Bird Observatory 103 West Hwy 332 Lake Jackson, TX 77566 jar...@gcbo.org www.gcbo.org Austin, Texas From: "Christopher T. Tessaglia-Hymes" Sent: Monday, March 05, 2012 8:45 AM To: "jar...@gcbo.org" , "Kenneth Victor Rosenberg" , "Benjamin Van Doren" Subject: RE: [nfc-l] Night Migrating Raptors Of note, all of the platforms are along the TX, LA, MS, AL. There are none in the Gulf-side offshore waters of Florida. Any trans-Gulf spring migrant Swallow-tailed Kites moving from the Yucatan to Florida would likely go unnoticed, especially if transiting entirely at night. Sincerely, Chris T-H -- Christopher T. Tessaglia-Hymes TARU Product Line Manager and Field Applications Engineer Bioacoustics Research Program, Cornell Lab of Ornithology 159 Sapsucker Woods Road, Ithaca, New York 14850 W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 http://www.birds.cornell.edu/brp From: John Arvin [mailto:jar...@gcbo.org] Sent: Friday, March 02, 2012 10:59 AM To: Kenneth Victor Rosenberg; Benjamin Van Doren Cc: Michael O'Brien; Christopher T. Tessaglia-Hymes; NFC-L Subject: Re: [nfc-l] Night Migrating Raptors Ken, I don't think there were any nighttime observations of raptors on the platform study per se, but some of the observers (not me unfortunately) did record small kettles of Missippii Kites which would have had to have been flying part of the distance in the dark just, as you say, because of the distance involved. All platforms had various falcons but these may have been coastwise rather than trans-gulf migrants. John C. Arvin Research Associate Gulf Coast Bird Observatory 103 West Hwy 332 Lake Jackson, TX 77566 jar...@gcbo.org www.gcbo.org Austin, Texas From: "Kenneth Victor Rosenberg" Sent: Friday, March 02, 2012 9:05 AM To: "Benjamin Van Doren" Subject: Re: [nfc-l] Night Migrating Raptors I would suspect that the nocturnal movements by raptors will turn out to be primarily over water -- where the total flight range involved necessitates a partly nocturnal crossing. Are there any other night-time records from the Gulf oil platform work a while back? Satellite tracking data may shed some light (or darkness) as well. KEN Ken Rosenberg Conservation Science Program Cornell Lab of Ornithology 607-254-2412 607-342-4594 (cell) k...@cornell.edu On Mar 1, 2012, at 10:24 PM, Benjamin Van Doren wrote: Awesome pictures, Chris. Michael, I recorded a calling Osprey on 4/16/11 at about midnight. However, I'm not completely convinced it's of an overflying migrant because it sounds relatively close to the microphone and there are nesting Ospreys close by. Still, it's the only Osprey vocalization I've found from that microphone (again, with nesting Ospreys very near) so I'm not exactly sure what to make of it. Does anyone know about the amount of vocalizing territorial Ospreys do at night? I've attached the recording. Benjamin On Thu, Mar 1, 2012 at 9:26 PM, Michael O'Brien wrote: Chris, Those photos are amazing! And they brings up an interesting general question about nocturnal migration by raptors. How much do they move at night? In Cape May I see plenty of evidence of at least limited nocturnal movement. We regularly see American Kestrels, Sharp-shinned Hawks, and Northern Harriers present in numbers (sometimes already high overhead) at first light when they were not present the day before. Also I have seen Osprey and Peregrine head out in apparent migration flight over Delaware Bay well after sunset. But the only nocturnal flight call I have heard from a raptor was from an Osprey which gave acouple of "tew" calls overhead a good two hours before sunrise. I wonder if others have seen or heard evidence of nocturnal migration by raptors. thanks, Michael Michael O'Brien Victor Emanuel Nature
RE: [nfc-l] Night Migrating Raptors
There is a substantial (and still increasing) breeding population of Swallow-tailed Kites in the western Gulf states that were not sampled by the Zimmermann thesis. These seem to be circus-Gulf migrants, at least in part. All reports of STKI from Texas so far this spring have been from Galveston eastward and would seem to be trans-Gulf migrants. The circus-Gulf movement comes a bit later and continues into May. John C. Arvin Research Associate Gulf Coast Bird Observatory 103 West Hwy 332 Lake Jackson, TX 77566 jar...@gcbo.org www.gcbo.org Austin, Texas From: "Christopher T. Tessaglia-Hymes" Sent: Monday, March 05, 2012 8:45 AM To: "jar...@gcbo.org" , "Kenneth Victor Rosenberg" , "Benjamin Van Doren" Subject: RE: [nfc-l] Night Migrating Raptors Of note, all of the platforms are along the TX, LA, MS, AL. There are none in the Gulf-side offshore waters of Florida. Any trans-Gulf spring migrant Swallow-tailed Kites moving from the Yucatan to Florida would likely go unnoticed, especially if transiting entirely at night. Sincerely, Chris T-H -- Christopher T. Tessaglia-Hymes TARU Product Line Manager and Field Applications Engineer Bioacoustics Research Program, Cornell Lab of Ornithology 159 Sapsucker Woods Road, Ithaca, New York 14850 W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 http://www.birds.cornell.edu/brp From: John Arvin [mailto:jar...@gcbo.org] Sent: Friday, March 02, 2012 10:59 AM To: Kenneth Victor Rosenberg; Benjamin Van Doren Cc: Michael O'Brien; Christopher T. Tessaglia-Hymes; NFC-L Subject: Re: [nfc-l] Night Migrating Raptors Ken, I don't think there were any nighttime observations of raptors on the platform study per se, but some of the observers (not me unfortunately) did record small kettles of Missippii Kites which would have had to have been flying part of the distance in the dark just, as you say, because of the distance involved. All platforms had various falcons but these may have been coastwise rather than trans-gulf migrants. John C. Arvin Research Associate Gulf Coast Bird Observatory 103 West Hwy 332 Lake Jackson, TX 77566 jar...@gcbo.org www.gcbo.org Austin, Texas From: "Kenneth Victor Rosenberg" Sent: Friday, March 02, 2012 9:05 AM To: "Benjamin Van Doren" Subject: Re: [nfc-l] Night Migrating Raptors I would suspect that the nocturnal movements by raptors will turn out to be primarily over water -- where the total flight range involved necessitates a partly nocturnal crossing. Are there any other night-time records from the Gulf oil platform work a while back? Satellite tracking data may shed some light (or darkness) as well. KEN Ken Rosenberg Conservation Science Program Cornell Lab of Ornithology 607-254-2412 607-342-4594 (cell) k...@cornell.edu On Mar 1, 2012, at 10:24 PM, Benjamin Van Doren wrote: Awesome pictures, Chris. Michael, I recorded a calling Osprey on 4/16/11 at about midnight. However, I'm not completely convinced it's of an overflying migrant because it sounds relatively close to the microphone and there are nesting Ospreys close by. Still, it's the only Osprey vocalization I've found from that microphone (again, with nesting Ospreys very near) so I'm not exactly sure what to make of it. Does anyone know about the amount of vocalizing territorial Ospreys do at night? I've attached the recording. Benjamin On Thu, Mar 1, 2012 at 9:26 PM, Michael O'Brien wrote: Chris, Those photos are amazing! And they brings up an interesting general question about nocturnal migration by raptors. How much do they move at night? In Cape May I see plenty of evidence of at least limited nocturnal movement. We regularly see American Kestrels, Sharp-shinned Hawks, and Northern Harriers present in numbers (sometimes already high overhead) at first light when they were not present the day before. Also I have seen Osprey and Peregrine head out in apparent migration flight over Delaware Bay well after sunset. But the only nocturnal flight call I have heard from a raptor was from an Osprey which gave acouple of "tew" calls overhead a good two hours before sunrise. I wonder if others have seen or heard evidence of nocturnal migration by raptors. thanks, Michael Michael O'Brien Victor Emanuel Nature Tours www.ventbird.com From: "Christopher T. Tessaglia-Hymes" To: "NFC-L" Sent: Thursday, March 1, 2012 4:01:22 PM Subject: Re: [nfc-l] Night Migrating Raptors Below is a link of a few pictures I managed to capture of a couple of the individuals. Unfortunately, due to our operations, I was not able to take time for extensive documentation. It was a very neat spectacle to have witnessed. Some details are at right of the album at the l
RE: [nfc-l] Night Migrating Raptors
Of note, all of the platforms are along the TX, LA, MS, AL. There are none in the Gulf-side offshore waters of Florida. Any trans-Gulf spring migrant Swallow-tailed Kites moving from the Yucatan to Florida would likely go unnoticed, especially if transiting entirely at night. Sincerely, Chris T-H -- Christopher T. Tessaglia-Hymes TARU Product Line Manager and Field Applications Engineer Bioacoustics Research Program, Cornell Lab of Ornithology 159 Sapsucker Woods Road, Ithaca, New York 14850 W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 http://www.birds.cornell.edu/brp From: John Arvin [mailto:jar...@gcbo.org] Sent: Friday, March 02, 2012 10:59 AM To: Kenneth Victor Rosenberg; Benjamin Van Doren Cc: Michael O'Brien; Christopher T. Tessaglia-Hymes; NFC-L Subject: Re: [nfc-l] Night Migrating Raptors Ken, I don't think there were any nighttime observations of raptors on the platform study per se, but some of the observers (not me unfortunately) did record small kettles of Missippii Kites which would have had to have been flying part of the distance in the dark just, as you say, because of the distance involved. All platforms had various falcons but these may have been coastwise rather than trans-gulf migrants. John C. Arvin Research Associate Gulf Coast Bird Observatory 103 West Hwy 332 Lake Jackson, TX 77566 jar...@gcbo.org<mailto:jar...@gcbo.org> www.gcbo.org<http://www.gcbo.org> Austin, Texas From: "Kenneth Victor Rosenberg" mailto:k...@cornell.edu>> Sent: Friday, March 02, 2012 9:05 AM To: "Benjamin Van Doren" mailto:bmvando...@gmail.com>> Subject: Re: [nfc-l] Night Migrating Raptors I would suspect that the nocturnal movements by raptors will turn out to be primarily over water -- where the total flight range involved necessitates a partly nocturnal crossing. Are there any other night-time records from the Gulf oil platform work a while back? Satellite tracking data may shed some light (or darkness) as well. KEN Ken Rosenberg Conservation Science Program Cornell Lab of Ornithology 607-254-2412 607-342-4594 (cell) k...@cornell.edu<mailto:k...@cornell.edu> On Mar 1, 2012, at 10:24 PM, Benjamin Van Doren wrote: Awesome pictures, Chris. Michael, I recorded a calling Osprey on 4/16/11 at about midnight. However, I'm not completely convinced it's of an overflying migrant because it sounds relatively close to the microphone and there are nesting Ospreys close by. Still, it's the only Osprey vocalization I've found from that microphone (again, with nesting Ospreys very near) so I'm not exactly sure what to make of it. Does anyone know about the amount of vocalizing territorial Ospreys do at night? I've attached the recording. Benjamin On Thu, Mar 1, 2012 at 9:26 PM, Michael O'Brien mailto:tsw...@comcast.net>> wrote: Chris, Those photos are amazing! And they brings up an interesting general question about nocturnal migration by raptors. How much do they move at night? In Cape May I see plenty of evidence of at least limited nocturnal movement. We regularly see American Kestrels, Sharp-shinned Hawks, and Northern Harriers present in numbers (sometimes already high overhead) at first light when they were not present the day before. Also I have seen Osprey and Peregrine head out in apparent migration flight over Delaware Bay well after sunset. But the only nocturnal flight call I have heard from a raptor was from an Osprey which gave acouple of "tew" calls overhead a good two hours before sunrise. I wonder if others have seen or heard evidence of nocturnal migration by raptors. thanks, Michael Michael O'Brien Victor Emanuel Nature Tours www.ventbird.com<http://www.ventbird.com/> From: "Christopher T. Tessaglia-Hymes" mailto:c...@cornell.edu>> To: "NFC-L" mailto:nf...@list.cornell.edu>> Sent: Thursday, March 1, 2012 4:01:22 PM Subject: Re: [nfc-l] Night Migrating Raptors Below is a link of a few pictures I managed to capture of a couple of the individuals. Unfortunately, due to our operations, I was not able to take time for extensive documentation. It was a very neat spectacle to have witnessed. Some details are at right of the album at the link, below. https://picasaweb.google.com/112522159565855378380/NightMigratingRaptors Sincerely, Chris T-H Currently at sea in the Gulf of Mexico, aboard the M/V Emily Bordelon. On Mar 1, 2012, at 4:41 AM, Christopher T. Tessaglia-Hymes wrote: Although these birds weren't making vocalizations, but it has been really cool to witness. I'm on the M/V Emily Bordelon about 150 miles WNW of Tampa, FL, working on recovering oceanographic research instruments. We're conducting 24-hour operations with deck lights blazing. from approximately 07:10 to 07:25 GMT (02:10 to 02:25 AM EST) the deck crew and I observed at least three simultaneous SWALLOW-TAI
RE: [nfc-l] Night Migrating Raptors
Thanks, Jim! As I have mentioned, this will go down as one of the more memorable night migrations for me, thus far. On the flip side of what you have observed, have others observed spring-time trans-Gulf migrating Swallow-tailed Kites approaching land at sunrise from the Western shores of Florida (or Southern shores of the Panhandle)? Very cool stuff! Sincerely, Chris T-H -- Christopher T. Tessaglia-Hymes TARU Product Line Manager and Field Applications Engineer Bioacoustics Research Program, Cornell Lab of Ornithology 159 Sapsucker Woods Road, Ithaca, New York 14850 W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 http://www.birds.cornell.edu/brp From: Jim Tate [mailto:j...@tate-tate.us] Sent: Friday, March 02, 2012 10:37 AM To: Christopher T. Tessaglia-Hymes Cc: NFC-L Subject: RE: [nfc-l] Night Migrating Raptors Chris- Thank you for your neat observations, and the pictures. I want to share a similar observation with you. When leading a birding trip to Yucatan for Audubon in late February 1976 I encountered apparently migrant Swallow-tailed Kites coming off the Gulf at Rio Lagartos. We were walking east along the beach at what is now the Ria Lagartos Natural Area. Just at dawn we saw one, then two, then one kite flying SSW from the open water toward land. We recorded the observations in our field notes, but have no pictures. This observation would seem consistent with your observations at sea. If they had left the Cuban shore (nearest land?), they would have started about 100 miles away. If we used an average speed of 15mph (sheer guess), that would be a 7 hour flight. This speculation is just a BOTE guess that even starting at nightfall they could have been flying all night. If they started further away, or traveled more slowly, even starting during daylight would have put them at the coast of Yucatan at daylight. -TATE James Tate, Jr., Ph.D. | Research Associate | Smithsonian Institution Migratory Bird Center | National Zoological Park | T 202-841-2056 | Email j...@tate-tate.us<mailto:j...@tate-tate.us> James Tate, Jr. | Senior Fellow and Director | Ecological Economics and Ethics Program | Potomac Institute for Policy Studies | Ballston Metro Center Office Tower | 901 N. Stuart Street, Suite 200, Arlington, VA 22203 Washington, DC 20007 T 202-841-2056| Email: jt...@potomacinstitute.org<mailto:jt...@potomacinstitute.org> James Tate, Jr. | Second Vice President Eastern Bird Banding Association. Email: j...@tate-tate.us<mailto:j...@tate-tate.us> Original Message -------- Subject: Re: [nfc-l] Night Migrating Raptors From: Kenneth Victor Rosenberg mailto:k...@cornell.edu>> Date: Thu, March 01, 2012 9:08 pm To: "Christopher T. Tessaglia-Hymes" mailto:c...@cornell.edu>> Cc: NFC-L mailto:nf...@list.cornell.edu>> Chris, this is very cool! I'm sure there is a publishable note there. Ken Rosenberg Conservation Science Program Cornell Lab of Ornithology 607-254-2412 607-342-4594 (cell) k...@cornell.edu<mailto:k...@cornell.edu> On Mar 1, 2012, at 4:01 PM, Christopher T. Tessaglia-Hymes wrote: Below is a link of a few pictures I managed to capture of a couple of the individuals. Unfortunately, due to our operations, I was not able to take time for extensive documentation. It was a very neat spectacle to have witnessed. Some details are at right of the album at the link, below. https://picasaweb.google.com/112522159565855378380/NightMigratingRaptors Sincerely, Chris T-H Currently at sea in the Gulf of Mexico, aboard the M/V Emily Bordelon. On Mar 1, 2012, at 4:41 AM, Christopher T. Tessaglia-Hymes wrote: Although these birds weren’t making vocalizations, but it has been really cool to witness. I’m on the M/V Emily Bordelon about 150 miles WNW of Tampa, FL, working on recovering oceanographic research instruments. We’re conducting 24-hour operations with deck lights blazing. from approximately 07:10 to 07:25 GMT (02:10 to 02:25 AM EST) the deck crew and I observed at least three simultaneous SWALLOW-TAILED KITES, 1 Laughing Gull, and a single OSPREY approach the vessel during an extended full-stop drifts. This was at about N28 26.491 by W85 27.459. I managed to get some half-decent photos of the Kites as they drifted over the vessel. At another point, from approximately 08:40 to 09:20 GMT (02:40 to 03:20 AM EST) we were visited by at least two more night migrating SWALLOW-TAILED KITES. I did not obtain photos of those birds. This was at about N28 17.256 by W85 32.837. I imagine there are several birds in migration across the Eastern Gulf of Mexico at this point and we should expect to have more observations at the next couple of nighttime stations. Good birding! Sincerely, Chris T-H -- Christopher T. Tessaglia-Hymes TARU Product Line Manager and Field Applications Engineer Bioacoustics Research Program, Cornell Lab of Ornithology 159 Sapsucker Woods Road, Ithaca, New Y
Re: [nfc-l] Night Migrating Raptors
Just one more observation per Jerry Liguori... http://utahbirders.blogspot.com/2011/01/swainsons-hawks-<http://utahbirders.blogspot.com/2011/01/swainsons-hawks-migrate-at-night.html> migrate-at-night.html<http://utahbirders.blogspot.com/2011/01/swainsons-hawks-migrate-at-night.html> On Fri, Mar 2, 2012 at 7:59 AM, John Arvin wrote: > Ken, > I don't think there were any nighttime observations of raptors on the > platform study per se, but some of the observers (not me unfortunately) did > record small kettles of Missippii Kites which would have had to have been > flying part of the distance in the dark just, as you say, because of the > distance involved. All platforms had various falcons but these may have > been coastwise rather than trans-gulf migrants. > > John C. Arvin > Research Associate > Gulf Coast Bird Observatory > 103 West Hwy 332 > Lake Jackson, TX 77566 > jar...@gcbo.org > www.gcbo.org > > Austin, Texas > > > -- > *From*: "Kenneth Victor Rosenberg" > *Sent*: Friday, March 02, 2012 9:05 AM > *To*: "Benjamin Van Doren" > > *Subject*: Re: [nfc-l] Night Migrating Raptors > > > I would suspect that the nocturnal movements by raptors will turn out to > be primarily over water -- where the total flight range involved > necessitates a partly nocturnal crossing. Are there any other night-time > records from the Gulf oil platform work a while back? Satellite tracking > data may shed some light (or darkness) as well. > > KEN > > > Ken Rosenberg > Conservation Science Program > Cornell Lab of Ornithology > 607-254-2412 > 607-342-4594 (cell) > k...@cornell.edu > > On Mar 1, 2012, at 10:24 PM, Benjamin Van Doren wrote: > > Awesome pictures, Chris. Michael, I recorded a calling Osprey on 4/16/11 > at about midnight. However, I'm not completely convinced it's of an > overflying migrant because it sounds relatively close to the microphone and > there are nesting Ospreys close by. Still, it's the only Osprey > vocalization I've found from that microphone (again, with nesting Ospreys > very near) so I'm not exactly sure what to make of it. Does anyone know > about the amount of vocalizing territorial Ospreys do at night? I've > attached the recording. > > Benjamin > > On Thu, Mar 1, 2012 at 9:26 PM, Michael O'Brien wrote: > >> Chris, >> >> Those photos are amazing! And they brings up an interesting general >> question about nocturnal migration by raptors. How much do they move at >> night? In Cape May I see plenty of evidence of at least limited nocturnal >> movement. We regularly see American Kestrels, Sharp-shinned Hawks, and >> Northern Harriers present in numbers (sometimes already high overhead) at >> first light when they were not present the day before. Also I have seen >> Osprey and Peregrine head out in apparent migration flight over Delaware >> Bay well after sunset. But the only nocturnal flight call I have heard from >> a raptor was from an Osprey which gave acouple of "tew" calls overhead a >> good two hours before sunrise. I wonder if others have seen or heard >> evidence of nocturnal migration by raptors. >> >> thanks, >> Michael >> >> Michael O'Brien >> Victor Emanuel Nature Tours >> www.ventbird.com >> -- >> *From: *"Christopher T. Tessaglia-Hymes" >> *To: *"NFC-L" >> *Sent: *Thursday, March 1, 2012 4:01:22 PM >> *Subject: *Re: [nfc-l] Night Migrating Raptors >> >> >> Below is a link of a few pictures I managed to capture of a couple of the >> individuals. Unfortunately, due to our operations, I was not able to take >> time for extensive documentation. It was a very neat spectacle to have >> witnessed. Some details are at right of the album at the link, below. >> >> https://picasaweb.google.com/112522159565855378380/NightMigratingRaptors >> >> Sincerely, >> Chris T-H >> Currently at sea in the Gulf of Mexico, aboard the M/V Emily Bordelon. >> >> >> >> On Mar 1, 2012, at 4:41 AM, Christopher T. Tessaglia-Hymes wrote: >> >> Although these birds weren't making vocalizations, but it has been >> really cool to witness. >> >> I'm on the M/V Emily Bordelon about 150 miles WNW of Tampa, FL, working >> on recovering oceanographic research instruments. We're conducting 24-hour >> operations with deck lights blazing. from approximately 07:10 to 07:25 GMT >> (02:10 to 02:25 AM EST) the deck crew and I observed at least three >> simultaneous SWALLOW-TAILED KITES, 1 Laughing Gull, and a single
Re: [nfc-l] Night Migrating Raptors
Ken, I don't think there were any nighttime observations of raptors on the platform study per se, but some of the observers (not me unfortunately) did record small kettles of Missippii Kites which would have had to have been flying part of the distance in the dark just, as you say, because of the distance involved. All platforms had various falcons but these may have been coastwise rather than trans-gulf migrants. John C. Arvin Research Associate Gulf Coast Bird Observatory 103 West Hwy 332 Lake Jackson, TX 77566 jar...@gcbo.org www.gcbo.org Austin, Texas From: "Kenneth Victor Rosenberg" Sent: Friday, March 02, 2012 9:05 AM To: "Benjamin Van Doren" Subject: Re: [nfc-l] Night Migrating Raptors I would suspect that the nocturnal movements by raptors will turn out to be primarily over water -- where the total flight range involved necessitates a partly nocturnal crossing. Are there any other night-time records from the Gulf oil platform work a while back? Satellite tracking data may shed some light (or darkness) as well. KEN Ken Rosenberg Conservation Science Program Cornell Lab of Ornithology 607-254-2412 607-342-4594 (cell) k...@cornell.edu On Mar 1, 2012, at 10:24 PM, Benjamin Van Doren wrote: Awesome pictures, Chris. Michael, I recorded a calling Osprey on 4/16/11 at about midnight. However, I'm not completely convinced it's of an overflying migrant because it sounds relatively close to the microphone and there are nesting Ospreys close by. Still, it's the only Osprey vocalization I've found from that microphone (again, with nesting Ospreys very near) so I'm not exactly sure what to make of it. Does anyone know about the amount of vocalizing territorial Ospreys do at night? I've attached the recording. Benjamin On Thu, Mar 1, 2012 at 9:26 PM, Michael O'Brien wrote: Chris, Those photos are amazing! And they brings up an interesting general question about nocturnal migration by raptors. How much do they move at night? In Cape May I see plenty of evidence of at least limited nocturnal movement. We regularly see American Kestrels, Sharp-shinned Hawks, and Northern Harriers present in numbers (sometimes already high overhead) at first light when they were not present the day before. Also I have seen Osprey and Peregrine head out in apparent migration flight over Delaware Bay well after sunset. But the only nocturnal flight call I have heard from a raptor was from an Osprey which gave acouple of "tew" calls overhead a good two hours before sunrise. I wonder if others have seen or heard evidence of nocturnal migration by raptors. thanks, Michael Michael O'Brien Victor Emanuel Nature Tours www.ventbird.com From: "Christopher T. Tessaglia-Hymes" To: "NFC-L" Sent: Thursday, March 1, 2012 4:01:22 PM Subject: Re: [nfc-l] Night Migrating Raptors Below is a link of a few pictures I managed to capture of a couple of the individuals. Unfortunately, due to our operations, I was not able to take time for extensive documentation. It was a very neat spectacle to have witnessed. Some details are at right of the album at the link, below. https://picasaweb.google.com/112522159565855378380/NightMigratingRaptors Sincerely, Chris T-H Currently at sea in the Gulf of Mexico, aboard the M/V Emily Bordelon. On Mar 1, 2012, at 4:41 AM, Christopher T. Tessaglia-Hymes wrote: Although these birds weren't making vocalizations, but it has been really cool to witness. I'm on the M/V Emily Bordelon about 150 miles WNW of Tampa, FL, working on recovering oceanographic research instruments. We're conducting 24-hour operations with deck lights blazing. from approximately 07:10 to 07:25 GMT (02:10 to 02:25 AM EST) the deck crew and I observed at least three simultaneous SWALLOW-TAILED KITES, 1 Laughing Gull, and a single OSPREY approach the vessel during an extended full-stop drifts. This was at about N28 26.491 by W85 27.459. I managed to get some half-decent photos of the Kites as they drifted over the vessel. At another point, from approximately 08:40 to 09:20 GMT (02:40 to 03:20 AM EST) we were visited by at least two more night migrating SWALLOW-TAILED KITES. I did not obtain photos of those birds. This was at about N28 17.256 by W85 32.837. I imagine there are several birds in migration across the Eastern Gulf of Mexico at this point and we should expect to have more observations at the next couple of nighttime stations. Good birding! Sincerely, Chris T-H -- Christopher T. Tessaglia-Hymes TARU Product Line Manager and Field Applications Engineer Bioacoustics Research Program, Cornell Lab of Ornithology 159 Sapsucker Woods Road, Ithaca, New York 14850 W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 http://www.birds.cornell.edu/brp -- NFC-L List Info: Welcome and Basics Rules and Infor
RE: [nfc-l] Night Migrating Raptors
Chris- Thank you for your neat observations, and the pictures. I want to share a similar observation with you.When leading a birding trip to Yucatan for Audubon in late February 1976 I encountered apparently migrant Swallow-tailed Kites coming off the Gulf at Rio Lagartos. We were walking east along the beach at what is now the Ria Lagartos Natural Area. Just at dawn we saw one, then two, then one kite flying SSW from the open water toward land. We recorded the observations in our field notes, but have no pictures.This observation would seem consistent with your observations at sea. If they had left the Cuban shore (nearest land?), they would have started about 100 miles away. If we used an average speed of 15mph (sheer guess), that would be a 7 hour flight. This speculation is just a BOTE guess that even starting at nightfall they could have been flying all night. If they started further away, or traveled more slowly, even starting during daylight would have put them at the coast of Yucatan at daylight. -TATEJames Tate, Jr., Ph.D. | Research Associate |Smithsonian Institution Migratory Bird Center | National Zoological Park |T 202-841-2056 | Email j...@tate-tate.usJames Tate, Jr. | Senior Fellow and Director |Ecological Economics and Ethics Program |Potomac Institute for Policy Studies |Ballston Metro Center Office Tower | 901 N. Stuart Street, Suite 200, Arlington, VA 22203Washington, DC 20007T 202-841-2056| Email: jt...@potomacinstitute.orgJames Tate, Jr. | Second Vice PresidentEastern Bird Banding Association.Email: j...@tate-tate.us Original Message Subject: Re: [nfc-l] Night Migrating Raptors From: Kenneth Victor Rosenberg <k...@cornell.edu> Date: Thu, March 01, 2012 9:08 pm To: "Christopher T. Tessaglia-Hymes" <c...@cornell.edu> Cc: NFC-L <nf...@list.cornell.edu> Chris, this is very cool! I'm sure there is a publishable note there. Ken Rosenberg Conservation Science Program Cornell Lab of Ornithology 607-254-2412 607-342-4594 (cell) k...@cornell.eduOn Mar 1, 2012, at 4:01 PM, Christopher T. Tessaglia-Hymes wrote:Below is a link of a few pictures I managed to capture of a couple of the individuals. Unfortunately, due to our operations, I was not able to take time for extensive documentation. It was a very neat spectacle to have witnessed. Some details are at right of the album at the link, below. https://picasaweb.google.com/112522159565855378380/NightMigratingRaptors Sincerely, Chris T-H Currently at sea in the Gulf of Mexico, aboard the M/V Emily Bordelon. On Mar 1, 2012, at 4:41 AM, Christopher T. Tessaglia-Hymes wrote: Although these birds weren’t making vocalizations, but it has been really cool to witness. I’m on the M/V Emily Bordelon about 150 miles WNW of Tampa, FL, working on recovering oceanographic research instruments. We’re conducting 24-hour operations with deck lights blazing. from approximately 07:10 to 07:25 GMT (02:10 to 02:25 AM EST) the deck crew and I observed at least three simultaneous SWALLOW-TAILED KITES, 1 Laughing Gull, and a single OSPREY approach the vessel during an extended full-stop drifts. This was at about N28 26.491 by W85 27.459. I managed to get some half-decent photos of the Kites as they drifted over the vessel. At another point, from approximately 08:40 to 09:20 GMT (02:40 to 03:20 AM EST) we were visited by at least two more night migrating SWALLOW-TAILED KITES. I did not obtain photos of those birds. This was at about N28 17.256 by W85 32.837. I imagine there are several birds in migration across the Eastern Gulf of Mexico at this point and we should expect to have more observations at the next couple of nighttime stations. Good birding! Sincerely, Chris T-H -- Christopher T. Tessaglia-Hymes TARU Product Line Manager and Field Applications Engineer Bioacoustics Research Program, Cornell Lab of Ornithology 159 Sapsucker Woods Road, Ithaca, New York 14850 W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 http://www.birds.cornell.edu/brp -- NFC-L List Info: Welcome and Basics Rules and Information Subscribe, Configuration and Leave Archives: The Mail Archive Surfbirds BirdingOnThe.Net Please submit your observations to eBird! ---- Christopher T. Tessaglia-Hymes TARU Product Line Manager and Field Applications Engineer Bioacoustics Research Program, Cornell Lab of Ornithology 159 Sapsucker Woods Road, Ithaca, New York 14850 W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 http://www.birds.cornell.edu/brp-- NFC-L List Info: Welcome and Basics Rules and Information Subscribe, Configuration and Leave Archives: The Mail Archive Surfbirds BirdingOnThe.Net Please submit your observations to eBird! -- -- NFC-L List Info: Welcome and Basics Rules and Information Subscribe, Configuration and Leave Archives: The Mail Archive Surfbirds BirdingOnThe.Net Please submit your observations to eBird! --
Re: [nfc-l] Night Migrating Raptors
Another way to test this idea of nocturnal migration in raptors loosely would be for birders in areas of the Great Basin/SW US to cover an isolated migrant trap over multiple days. Accipiters and kestrals commonly use these spots in migration. You wouldn't really know if a bird moved locally, but in places where there isn't another tree in 20-40 miles you may be able make an argument by the presence/absence of a bird at a migrant trap between days as a sign of nocturnal migration. Obviously, more could be said if an observer noted the presence/absence of an individual right at sunrise/sunset, which is entirely plausible at some of these migrant traps. I personally can't think of noticing this one way or the other in my time in Utah, but it might be something for other birders in the region to think about... Colby On Fri, Mar 2, 2012 at 7:05 AM, Kenneth Victor Rosenberg wrote: > I would suspect that the nocturnal movements by raptors will turn out to > be primarily over water -- where the total flight range involved > necessitates a partly nocturnal crossing. Are there any other night-time > records from the Gulf oil platform work a while back? Satellite tracking > data may shed some light (or darkness) as well. > > KEN > > > > Ken Rosenberg > Conservation Science Program > Cornell Lab of Ornithology > 607-254-2412 > 607-342-4594 (cell) > k...@cornell.edu > > On Mar 1, 2012, at 10:24 PM, Benjamin Van Doren wrote: > > Awesome pictures, Chris. Michael, I recorded a calling Osprey on 4/16/11 > at about midnight. However, I'm not completely convinced it's of an > overflying migrant because it sounds relatively close to the microphone and > there are nesting Ospreys close by. Still, it's the only Osprey > vocalization I've found from that microphone (again, with nesting Ospreys > very near) so I'm not exactly sure what to make of it. Does anyone know > about the amount of vocalizing territorial Ospreys do at night? I've > attached the recording. > > Benjamin > > On Thu, Mar 1, 2012 at 9:26 PM, Michael O'Brien wrote: > >> Chris, >> >> Those photos are amazing! And they brings up an interesting general >> question about nocturnal migration by raptors. How much do they move at >> night? In Cape May I see plenty of evidence of at least limited nocturnal >> movement. We regularly see American Kestrels, Sharp-shinned Hawks, and >> Northern Harriers present in numbers (sometimes already high overhead) at >> first light when they were not present the day before. Also I have seen >> Osprey and Peregrine head out in apparent migration flight over Delaware >> Bay well after sunset. But the only nocturnal flight call I have heard from >> a raptor was from an Osprey which gave acouple of "tew" calls overhead a >> good two hours before sunrise. I wonder if others have seen or heard >> evidence of nocturnal migration by raptors. >> >> thanks, >> Michael >> >> Michael O'Brien >> Victor Emanuel Nature Tours >> www.ventbird.com >> -- >> *From: *"Christopher T. Tessaglia-Hymes" >> *To: *"NFC-L" >> *Sent: *Thursday, March 1, 2012 4:01:22 PM >> *Subject: *Re: [nfc-l] Night Migrating Raptors >> >> >> Below is a link of a few pictures I managed to capture of a couple of the >> individuals. Unfortunately, due to our operations, I was not able to take >> time for extensive documentation. It was a very neat spectacle to have >> witnessed. Some details are at right of the album at the link, below. >> >> https://picasaweb.google.com/112522159565855378380/NightMigratingRaptors >> >> Sincerely, >> Chris T-H >> Currently at sea in the Gulf of Mexico, aboard the M/V Emily Bordelon. >> >> >> >> On Mar 1, 2012, at 4:41 AM, Christopher T. Tessaglia-Hymes wrote: >> >> Although these birds weren’t making vocalizations, but it has been >> really cool to witness. >> >> I’m on the M/V Emily Bordelon about 150 miles WNW of Tampa, FL, working >> on recovering oceanographic research instruments. We’re conducting 24-hour >> operations with deck lights blazing. from approximately 07:10 to 07:25 GMT >> (02:10 to 02:25 AM EST) the deck crew and I observed at least three >> simultaneous SWALLOW-TAILED KITES, 1 Laughing Gull, and a single OSPREY >> approach the vessel during an extended full-stop drifts. This was at about >> N28 26.491 by W85 27.459. I managed to get some half-decent photos of the >> Kites as they drifted over the vessel. >> >> At another point, from approximately 08:40 to 09:20 GMT (02:40 to 03:20 >> AM EST) we were visited by at leas
Re: [nfc-l] Night Migrating Raptors
I would suspect that the nocturnal movements by raptors will turn out to be primarily over water -- where the total flight range involved necessitates a partly nocturnal crossing. Are there any other night-time records from the Gulf oil platform work a while back? Satellite tracking data may shed some light (or darkness) as well. KEN Ken Rosenberg Conservation Science Program Cornell Lab of Ornithology 607-254-2412 607-342-4594 (cell) k...@cornell.edu<mailto:k...@cornell.edu> On Mar 1, 2012, at 10:24 PM, Benjamin Van Doren wrote: Awesome pictures, Chris. Michael, I recorded a calling Osprey on 4/16/11 at about midnight. However, I'm not completely convinced it's of an overflying migrant because it sounds relatively close to the microphone and there are nesting Ospreys close by. Still, it's the only Osprey vocalization I've found from that microphone (again, with nesting Ospreys very near) so I'm not exactly sure what to make of it. Does anyone know about the amount of vocalizing territorial Ospreys do at night? I've attached the recording. Benjamin On Thu, Mar 1, 2012 at 9:26 PM, Michael O'Brien mailto:tsw...@comcast.net>> wrote: Chris, Those photos are amazing! And they brings up an interesting general question about nocturnal migration by raptors. How much do they move at night? In Cape May I see plenty of evidence of at least limited nocturnal movement. We regularly see American Kestrels, Sharp-shinned Hawks, and Northern Harriers present in numbers (sometimes already high overhead) at first light when they were not present the day before. Also I have seen Osprey and Peregrine head out in apparent migration flight over Delaware Bay well after sunset. But the only nocturnal flight call I have heard from a raptor was from an Osprey which gave acouple of "tew" calls overhead a good two hours before sunrise. I wonder if others have seen or heard evidence of nocturnal migration by raptors. thanks, Michael Michael O'Brien Victor Emanuel Nature Tours www.ventbird.com<http://www.ventbird.com/> From: "Christopher T. Tessaglia-Hymes" mailto:c...@cornell.edu>> To: "NFC-L" mailto:nf...@list.cornell.edu>> Sent: Thursday, March 1, 2012 4:01:22 PM Subject: Re: [nfc-l] Night Migrating Raptors Below is a link of a few pictures I managed to capture of a couple of the individuals. Unfortunately, due to our operations, I was not able to take time for extensive documentation. It was a very neat spectacle to have witnessed. Some details are at right of the album at the link, below. https://picasaweb.google.com/112522159565855378380/NightMigratingRaptors Sincerely, Chris T-H Currently at sea in the Gulf of Mexico, aboard the M/V Emily Bordelon. On Mar 1, 2012, at 4:41 AM, Christopher T. Tessaglia-Hymes wrote: Although these birds weren’t making vocalizations, but it has been really cool to witness. I’m on the M/V Emily Bordelon about 150 miles WNW of Tampa, FL, working on recovering oceanographic research instruments. We’re conducting 24-hour operations with deck lights blazing. from approximately 07:10 to 07:25 GMT (02:10 to 02:25 AM EST) the deck crew and I observed at least three simultaneous SWALLOW-TAILED KITES, 1 Laughing Gull, and a single OSPREY approach the vessel during an extended full-stop drifts. This was at about N28 26.491 by W85 27.459. I managed to get some half-decent photos of the Kites as they drifted over the vessel. At another point, from approximately 08:40 to 09:20 GMT (02:40 to 03:20 AM EST) we were visited by at least two more night migrating SWALLOW-TAILED KITES. I did not obtain photos of those birds. This was at about N28 17.256 by W85 32.837. I imagine there are several birds in migration across the Eastern Gulf of Mexico at this point and we should expect to have more observations at the next couple of nighttime stations. Good birding! Sincerely, Chris T-H -- Christopher T. Tessaglia-Hymes TARU Product Line Manager and Field Applications Engineer Bioacoustics Research Program, Cornell Lab of Ornithology 159 Sapsucker Woods Road, Ithaca, New York 14850 W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 http://www.birds.cornell.edu/brp -- NFC-L List Info: Welcome and Basics<http://www.northeastbirding.com/NFC_WELCOME> Rules and Information<http://www.northeastbirding.com/NFC_RULES> Subscribe, Configuration and Leave<http://www.northeastbirding.com/NFC-L_SubscribeConfigurationLeave.htm> Archives: The Mail Archive<http://www.mail-archive.com/nfc-l@cornell.edu/maillist.html> Surfbirds<http://www.surfbirds.com/birdingmail/Group/NFC-L> BirdingOnThe.Net<http://birdingonthe.net/mailinglists/NFCL.html> Please submit your observations to eBird<http://ebird.org/content/ebird/>! -- -- Christopher T. Tessaglia-Hymes TARU Product Line Manager and Field Applications Engineer Bioacoustics Research Program, Co
Re: [nfc-l] Night Migrating Raptors
One thing I forgot to mention that when I read Jason's post reminded me of it, when I counted in Veracruz in 2001, one of our largest Broad Winged Hawk days we still had very high (hard time seeing them with unaided eye) Broad-wings at sunset. It would be very interesting to figure out when raptors decide to make these after dark migrations, either to initiate before sunrise or continue on after sunset. Its obvious that in some cases they have no choice, like when they are crossing the gulf, but it makes sense that when the optimum conditions for migration are encountered they may opportunistically extend the normal hours they are migrating. In the case of these Broad-winged Hawks we all wondered at the time when they would have come down to a level to roost, when the thermals stopped or when it became too dark to see... Mike Michael Lanzone mlanz...@gmail.com On Fri, Mar 2, 2012 at 9:51 AM, Jason Guerard wrote: > All, > > First, fantastic images! I wonder if these are thew fist images of kites > during their nocturnal migration? > > Just a couple observations to add to the discussion. > > When I was doing some work with Project Puffin on Seal Island NWR, back > in 2002 I think, I saw an adult Bald Eagle headed seemingly out to sea at > sunset/twilight. Seal Island is about 20 miles south east of the coast of > Rockland Maine. Not sure where this bird was headed, I assume Isle Au > Haut. > > Additionally, in my couple of seasons counting hawks in Cape May, I > observed on a few occasions stratospheric Northern Harriers just after > first light. To me this seems indicative that they engaging in some sort > of nocturnal movement. Others seen that would have been moving in the dark > include the expected, Peregrines and Osprey. > > Jason Guerard > > -- > *From:* Michael Lanzone > *To:* Ted Floyd > *Cc:* Magnus Robb ; Michael O'Brien < > tsw...@comcast.net>; Christopher T. Tessaglia-Hymes ; > NFC-L > *Sent:* Friday, March 2, 2012 8:48 AM > > *Subject:* Re: [nfc-l] Night Migrating Raptors > > Hi All, > > Since we are on the discussion of night migrants raptors... one of our > Golden Eagles started moving a little over an hour before sunrise in the > spring last year. Our transmitters are programmed to start collecting data > at sunrise, this one malfunctioned and was recording data 24 hours a day. > Good thing, made us reevaluate when we should be collecting data! I often > wondered if golden's moved during dark hours as we have them on our > camera traps well before first light and after sunset but of course those > birds did not have telemetry units on so we had no way to know if they > roosted there. A golden eagle is not a species you typically expect to > move during dark hours, but they apparently will. > > One other question that came up in the thread about night calling raptors, > yes many raptor species will call throughout the night. Of the species > nests I have monitored over the years I have heard Osprey, Peregrine > Falcons, Bald Eagles, Golden Eagles, and Kestrels calling at night (in many > cases in the middle of the night). > > Best, > Mike > > Michael Lanzone > mlanz...@gmail.com > > > > On Fri, Mar 2, 2012 at 8:16 AM, Ted Floyd wrote: > > ** > Hi, all. > > Here's a paper with some relevance to the current discussion: > > Decandido, R., R. O. Bierregaard, Jr., M. S. Martell, and K. L. Bildstein. > 2006. Evidence of nocturnal migration by Osprey *(Pandion haliaetus)* in > North America and Western Europe. Journal of Raptor Research 40:156–158. > > > Ted Floyd > tfl...@aba.org > > Lafayette, Boulder County, Colorado, USA > > > > -- > *From:* bounce-41634266-9667...@list.cornell.edu [mailto: > bounce-41634266-9667...@list.cornell.edu] *On Behalf Of *Magnus Robb > *Sent:* Friday, March 02, 2012 1:47 AM > *To:* Michael O'Brien > *Cc:* Christopher T. Tessaglia-Hymes; NFC-L > > *Subject:* Re: [nfc-l] Night Migrating Raptors > > I have sometimes heard Peregrines while recording nocturnal migration, and > I know that Sergey Gashkov in Tomsk, Siberia has also recorded them. > However, there is no guarantee that these Peregrines were migrating. Here > in Portugal, our Peregrines are resident. I have also seen at least one > from the Arctic during the non-breeding season, and F p calidus are > probably regular migrants in small numbers. However, I would guess that the > sounds I have heard are from local birds interacting while hunting numerous > migrating Turtle Doves, with the help of streetlights or moonlight. > > cheers, > > Magnus > > > On 2 Mar 2012, at 2:26:14, Michael O'Brien wrote: > > Chris, > &g
Re: [nfc-l] Night Migrating Raptors
All, First, fantastic images! I wonder if these are thew fist images of kites during their nocturnal migration? Just a couple observations to add to the discussion. When I was doing some work with Project Puffin on Seal Island NWR, back in 2002 I think, I saw an adult Bald Eagle headed seemingly out to sea at sunset/twilight. Seal Island is about 20 miles south east of the coast of Rockland Maine. Not sure where this bird was headed, I assume Isle Au Haut. Additionally, in my couple of seasons counting hawks in Cape May, I observed on a few occasions stratospheric Northern Harriers just after first light. To me this seems indicative that they engaging in some sort of nocturnal movement. Others seen that would have been moving in the dark include the expected, Peregrines and Osprey. Jason Guerard From: Michael Lanzone To: Ted Floyd Cc: Magnus Robb ; Michael O'Brien ; Christopher T. Tessaglia-Hymes ; NFC-L Sent: Friday, March 2, 2012 8:48 AM Subject: Re: [nfc-l] Night Migrating Raptors Hi All, Since we are on the discussion of night migrants raptors... one of our Golden Eagles started moving a little over an hour before sunrise in the spring last year. Our transmitters are programmed to start collecting data at sunrise, this one malfunctioned and was recording data 24 hours a day. Good thing, made us reevaluate when we should be collecting data! I often wondered if golden's moved during dark hours as we have them on our camera traps well before first light and after sunset but of course those birds did not have telemetry units on so we had no way to know if they roosted there. A golden eagle is not a species you typically expect to move during dark hours, but they apparently will. One other question that came up in the thread about night calling raptors, yes many raptor species will call throughout the night. Of the species nests I have monitored over the years I have heard Osprey, Peregrine Falcons, Bald Eagles, Golden Eagles, and Kestrels calling at night (in many cases in the middle of the night). Best, Mike Michael Lanzone mlanz...@gmail.com On Fri, Mar 2, 2012 at 8:16 AM, Ted Floyd wrote: >Hi, all. > >Here's a paper with some relevance to the current discussion: > >Decandido, R., R. O. Bierregaard, Jr., M. S. Martell, and K. L. Bildstein. 2006. Evidence of nocturnal migration by Osprey (Pandionhaliaetus) in North America and Western Europe. Journal of Raptor Research 40:156–158. > > >Ted Floyd >tfl...@aba.org > >Lafayette, Boulder County, Colorado, USA > > > > > > > From: bounce-41634266-9667...@list.cornell.edu > [mailto:bounce-41634266-9667...@list.cornell.edu] On Behalf Of Magnus Robb >Sent: Friday, March 02, 2012 1:47 AM >To: Michael O'Brien >Cc: Christopher T. Tessaglia-Hymes; NFC-L > >Subject: Re: [nfc-l] Night Migrating Raptors > > >I have sometimes heard Peregrines while recording nocturnal migration, and I know that SergeyGashkov in Tomsk, Siberia has also recorded them. However, there is no guarantee that these Peregrines were migrating. Here in Portugal, our Peregrines are resident. I have also seen at least one from the Arctic during the non-breeding season, and F p calidus are probably regular migrants in small numbers. However, I would guess that the sounds I have heard are from local birds interacting while hunting numerous migrating Turtle Doves, with the help of streetlights or moonlight. > > >cheers, > > >Magnus > > > > > >On 2 Mar 2012, at 2:26:14, Michael O'Brien wrote: > >Chris, >> >> >>Those photos are amazing! And they brings up an interesting general question >>about nocturnal migration by raptors. How much do they move at night? In >>Cape May I see plenty of evidence of at least limited nocturnal movement. We >>regularly see American Kestrels, Sharp-shinned Hawks, and Northern Harriers >>present in numbers (sometimes already high overhead) at first light when they >> were not present the day before. Also I have seen Osprey and Peregrine head >>out in apparent migration flight over Delaware Bay well after sunset. But the >> only nocturnal flight call I have heard from a raptor was from an Osprey >>which gave acouple of "tew" calls overhead a good two hours before sunrise. >>I wonder if others have seen or heard evidence of nocturnal migration by >>raptors. >> >> >>thanks, >>Michael >> >> >>Michael O'Brien >>Victor Emanuel Nature Tours >>www.ventbird.com >> >> >> From: "Christopher T. Tessaglia-Hymes" >>To: "NFC-L" >>Sent: Thursday, March 1, 2012 4:01:22
RE: [nfc-l] Night Migrating Raptors
I also had the same thought. May be slower birds arrive late. From: bounce-41634916-10061...@list.cornell.edu [mailto:bounce-41634916-10061...@list.cornell.edu] On Behalf Of Kevin J. McGowan Sent: Friday, March 02, 2012 9:45 AM To: Michael O'Brien; Christopher T. Tessaglia-Hymes Cc: NFC-L Subject: RE: [nfc-l] Night Migrating Raptors You know, it takes longer than one period of daylight to cross the Gulf, so any diurnal migrant trying to do so would have to fly at least part of the time at night. Kevin Kevin McGowan Ithaca From: bounce-41633657-10073...@list.cornell.edu [mailto:bounce-41633657-10073...@list.cornell.edu] On Behalf Of Michael O'Brien Sent: Thursday, March 01, 2012 9:26 PM To: Christopher T. Tessaglia-Hymes Cc: NFC-L Subject: Re: [nfc-l] Night Migrating Raptors Chris, Those photos are amazing! And they brings up an interesting general question about nocturnal migration by raptors. How much do they move at night? In Cape May I see plenty of evidence of at least limited nocturnal movement. We regularly see American Kestrels, Sharp-shinned Hawks, and Northern Harriers present in numbers (sometimes already high overhead) at first light when they were not present the day before. Also I have seen Osprey and Peregrine head out in apparent migration flight over Delaware Bay well after sunset. But the only nocturnal flight call I have heard from a raptor was from an Osprey which gave acouple of "tew" calls overhead a good two hours before sunrise. I wonder if others have seen or heard evidence of nocturnal migration by raptors. thanks, Michael Michael O'Brien Victor Emanuel Nature Tours www.ventbird.com<http://www.ventbird.com> From: "Christopher T. Tessaglia-Hymes" mailto:c...@cornell.edu>> To: "NFC-L" mailto:nf...@list.cornell.edu>> Sent: Thursday, March 1, 2012 4:01:22 PM Subject: Re: [nfc-l] Night Migrating Raptors Below is a link of a few pictures I managed to capture of a couple of the individuals. Unfortunately, due to our operations, I was not able to take time for extensive documentation. It was a very neat spectacle to have witnessed. Some details are at right of the album at the link, below. https://picasaweb.google.com/112522159565855378380/NightMigratingRaptors Sincerely, Chris T-H Currently at sea in the Gulf of Mexico, aboard the M/V Emily Bordelon. On Mar 1, 2012, at 4:41 AM, Christopher T. Tessaglia-Hymes wrote: Although these birds weren’t making vocalizations, but it has been really cool to witness. I’m on the M/V Emily Bordelon about 150 miles WNW of Tampa, FL, working on recovering oceanographic research instruments. We’re conducting 24-hour operations with deck lights blazing. from approximately 07:10 to 07:25 GMT (02:10 to 02:25 AM EST) the deck crew and I observed at least three simultaneous SWALLOW-TAILED KITES, 1 Laughing Gull, and a single OSPREY approach the vessel during an extended full-stop drifts. This was at about N28 26.491 by W85 27.459. I managed to get some half-decent photos of the Kites as they drifted over the vessel. At another point, from approximately 08:40 to 09:20 GMT (02:40 to 03:20 AM EST) we were visited by at least two more night migrating SWALLOW-TAILED KITES. I did not obtain photos of those birds. This was at about N28 17.256 by W85 32.837. I imagine there are several birds in migration across the Eastern Gulf of Mexico at this point and we should expect to have more observations at the next couple of nighttime stations. Good birding! Sincerely, Chris T-H -- Christopher T. Tessaglia-Hymes TARU Product Line Manager and Field Applications Engineer Bioacoustics Research Program, Cornell Lab of Ornithology 159 Sapsucker Woods Road, Ithaca, New York 14850 W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 http://www.birds.cornell.edu/brp -- NFC-L List Info: Welcome and Basics<http://www.northeastbirding.com/NFC_WELCOME> Rules and Information<http://www.northeastbirding.com/NFC_RULES> Subscribe, Configuration and Leave<http://www.northeastbirding.com/NFC-L_SubscribeConfigurationLeave.htm> Archives: The Mail Archive<http://www.mail-archive.com/nfc-l@cornell.edu/maillist.html> Surfbirds<http://www.surfbirds.com/birdingmail/Group/NFC-L> BirdingOnThe.Net<http://birdingonthe.net/mailinglists/NFCL.html> Please submit your observations to eBird<http://ebird.org/content/ebird/>! -- -- Christopher T. Tessaglia-Hymes TARU Product Line Manager and Field Applications Engineer Bioacoustics Research Program, Cornell Lab of Ornithology 159 Sapsucker Woods Road, Ithaca, New York 14850 W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 http://www.birds.cornell.edu/brp -- NFC-L List Info: Welcome and Basics<http://www.northeastbirding.com/NFC_WELCOME> Rules and Information<http://www.northeastbirding.com/NFC_RULES> Subscribe, Configuration and Leave<http://www.northeastbirdin
Re: [nfc-l] Night Migrating Raptors
Very cool observation! Swallow-tailed kites are known to migrate at night over water between Florida and Cuba. See the linked thesis by Gina Zimmerman who tracked kites with satellite and radio transmitters. http://www.bio.georgiasouthern.edu/bio-home/chandler/Zimmerman.pdf Cheers, Jeff Jeffrey Buler, Ph.D. Assistant Professor of Wildlife Ecology Department of Entomology & Wildlife Ecology University of Delaware 246 Townsend Hall Newark, DE, USA 19716 Office: 302-831-1306 Mobile: 302-723-0156 Fax: 302-831-8889 http://ag.udel.edu/enwc/faculty/Buler.htm Center for Managed Ecosystems On 3/1/2012 4:41 AM, Christopher T. Tessaglia-Hymes wrote: Although these birds weren’t making vocalizations, but it has been really cool to witness. I’m on the M/V Emily Bordelon about 150 miles WNW of Tampa, FL, working on recovering oceanographic research instruments. We’re conducting 24-hour operations with deck lights blazing. from approximately 07:10 to 07:25 GMT (02:10 to 02:25 AM EST) the deck crew and I observed at least three simultaneous SWALLOW-TAILED KITES, 1 Laughing Gull, and a single OSPREY approach the vessel during an extended full-stop drifts. This was at about N28 26.491 by W85 27.459. I managed to get some half-decent photos of the Kites as they drifted over the vessel. At another point, from approximately 08:40 to 09:20 GMT (02:40 to 03:20 AM EST) we were visited by at least two more night migrating SWALLOW-TAILED KITES. I did not obtain photos of those birds. This was at about N28 17.256 by W85 32.837. I imagine there are several birds in migration across the Eastern Gulf of Mexico at this point and we should expect to have more observations at the next couple of nighttime stations. Good birding! Sincerely, Chris T-H -- Christopher T. Tessaglia-Hymes TARU Product Line Manager and Field Applications Engineer Bioacoustics Research Program, Cornell Lab of Ornithology 159 Sapsucker Woods Road, Ithaca, New York 14850 W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 http://www.birds.cornell.edu/brp -- NFC-L List Info: Welcome and Basics Rules and Information Subscribe, Configuration and Leave Archives: The Mail Archive Surfbirds BirdingOnThe.Net Please submit your observations to eBird! -- -- NFC-L List Info: Welcome and Basics Rules and Information Subscribe, Configuration and Leave Archives: The Mail Archive Surfbirds BirdingOnThe.Net Please submit your observations to eBird! --
RE: [nfc-l] Night Migrating Raptors
You know, it takes longer than one period of daylight to cross the Gulf, so any diurnal migrant trying to do so would have to fly at least part of the time at night. Kevin Kevin McGowan Ithaca From: bounce-41633657-10073...@list.cornell.edu [mailto:bounce-41633657-10073...@list.cornell.edu] On Behalf Of Michael O'Brien Sent: Thursday, March 01, 2012 9:26 PM To: Christopher T. Tessaglia-Hymes Cc: NFC-L Subject: Re: [nfc-l] Night Migrating Raptors Chris, Those photos are amazing! And they brings up an interesting general question about nocturnal migration by raptors. How much do they move at night? In Cape May I see plenty of evidence of at least limited nocturnal movement. We regularly see American Kestrels, Sharp-shinned Hawks, and Northern Harriers present in numbers (sometimes already high overhead) at first light when they were not present the day before. Also I have seen Osprey and Peregrine head out in apparent migration flight over Delaware Bay well after sunset. But the only nocturnal flight call I have heard from a raptor was from an Osprey which gave acouple of "tew" calls overhead a good two hours before sunrise. I wonder if others have seen or heard evidence of nocturnal migration by raptors. thanks, Michael Michael O'Brien Victor Emanuel Nature Tours www.ventbird.com<http://www.ventbird.com> From: "Christopher T. Tessaglia-Hymes" mailto:c...@cornell.edu>> To: "NFC-L" mailto:nf...@list.cornell.edu>> Sent: Thursday, March 1, 2012 4:01:22 PM Subject: Re: [nfc-l] Night Migrating Raptors Below is a link of a few pictures I managed to capture of a couple of the individuals. Unfortunately, due to our operations, I was not able to take time for extensive documentation. It was a very neat spectacle to have witnessed. Some details are at right of the album at the link, below. https://picasaweb.google.com/112522159565855378380/NightMigratingRaptors Sincerely, Chris T-H Currently at sea in the Gulf of Mexico, aboard the M/V Emily Bordelon. On Mar 1, 2012, at 4:41 AM, Christopher T. Tessaglia-Hymes wrote: Although these birds weren’t making vocalizations, but it has been really cool to witness. I’m on the M/V Emily Bordelon about 150 miles WNW of Tampa, FL, working on recovering oceanographic research instruments. We’re conducting 24-hour operations with deck lights blazing. from approximately 07:10 to 07:25 GMT (02:10 to 02:25 AM EST) the deck crew and I observed at least three simultaneous SWALLOW-TAILED KITES, 1 Laughing Gull, and a single OSPREY approach the vessel during an extended full-stop drifts. This was at about N28 26.491 by W85 27.459. I managed to get some half-decent photos of the Kites as they drifted over the vessel. At another point, from approximately 08:40 to 09:20 GMT (02:40 to 03:20 AM EST) we were visited by at least two more night migrating SWALLOW-TAILED KITES. I did not obtain photos of those birds. This was at about N28 17.256 by W85 32.837. I imagine there are several birds in migration across the Eastern Gulf of Mexico at this point and we should expect to have more observations at the next couple of nighttime stations. Good birding! Sincerely, Chris T-H -- Christopher T. Tessaglia-Hymes TARU Product Line Manager and Field Applications Engineer Bioacoustics Research Program, Cornell Lab of Ornithology 159 Sapsucker Woods Road, Ithaca, New York 14850 W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 http://www.birds.cornell.edu/brp -- NFC-L List Info: Welcome and Basics<http://www.northeastbirding.com/NFC_WELCOME> Rules and Information<http://www.northeastbirding.com/NFC_RULES> Subscribe, Configuration and Leave<http://www.northeastbirding.com/NFC-L_SubscribeConfigurationLeave.htm> Archives: The Mail Archive<http://www.mail-archive.com/nfc-l@cornell.edu/maillist.html> Surfbirds<http://www.surfbirds.com/birdingmail/Group/NFC-L> BirdingOnThe.Net<http://birdingonthe.net/mailinglists/NFCL.html> Please submit your observations to eBird<http://ebird.org/content/ebird/>! -- -- Christopher T. Tessaglia-Hymes TARU Product Line Manager and Field Applications Engineer Bioacoustics Research Program, Cornell Lab of Ornithology 159 Sapsucker Woods Road, Ithaca, New York 14850 W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 http://www.birds.cornell.edu/brp -- NFC-L List Info: Welcome and Basics<http://www.northeastbirding.com/NFC_WELCOME> Rules and Information<http://www.northeastbirding.com/NFC_RULES> Subscribe, Configuration and Leave<http://www.northeastbirding.com/NFC-L_SubscribeConfigurationLeave.htm> Archives: The Mail Archive<http://www.mail-archive.com/nfc-l@cornell.edu/maillist.html> Surfbirds<http://www.surfbirds.com/birdingmail/Group/NFC-L> BirdingOnThe.Net<http://birdingonthe.net/mailinglists/NFCL.html> Please submit your observations to eBird<http://ebird.org/c
Re: [nfc-l] Night Migrating Raptors
Hi All, Since we are on the discussion of night migrants raptors... one of our Golden Eagles started moving a little over an hour before sunrise in the spring last year. Our transmitters are programmed to start collecting data at sunrise, this one malfunctioned and was recording data 24 hours a day. Good thing, made us reevaluate when we should be collecting data! I often wondered if golden's moved during dark hours as we have them on our camera traps well before first light and after sunset but of course those birds did not have telemetry units on so we had no way to know if they roosted there. A golden eagle is not a species you typically expect to move during dark hours, but they apparently will. One other question that came up in the thread about night calling raptors, yes many raptor species will call throughout the night. Of the species nests I have monitored over the years I have heard Osprey, Peregrine Falcons, Bald Eagles, Golden Eagles, and Kestrels calling at night (in many cases in the middle of the night). Best, Mike Michael Lanzone mlanz...@gmail.com On Fri, Mar 2, 2012 at 8:16 AM, Ted Floyd wrote: > ** > Hi, all. > > Here's a paper with some relevance to the current discussion: > > Decandido, R., R. O. Bierregaard, Jr., M. S. Martell, and K. L. Bildstein. > 2006. Evidence of nocturnal migration by Osprey *(Pandion haliaetus)* in > North America and Western Europe. Journal of Raptor Research 40:156–158. > > > Ted Floyd > tfl...@aba.org > > Lafayette, Boulder County, Colorado, USA > > > > -- > *From:* bounce-41634266-9667...@list.cornell.edu [mailto: > bounce-41634266-9667...@list.cornell.edu] *On Behalf Of *Magnus Robb > *Sent:* Friday, March 02, 2012 1:47 AM > *To:* Michael O'Brien > *Cc:* Christopher T. Tessaglia-Hymes; NFC-L > > *Subject:* Re: [nfc-l] Night Migrating Raptors > > I have sometimes heard Peregrines while recording nocturnal migration, and > I know that Sergey Gashkov in Tomsk, Siberia has also recorded them. > However, there is no guarantee that these Peregrines were migrating. Here > in Portugal, our Peregrines are resident. I have also seen at least one > from the Arctic during the non-breeding season, and F p calidus are > probably regular migrants in small numbers. However, I would guess that the > sounds I have heard are from local birds interacting while hunting numerous > migrating Turtle Doves, with the help of streetlights or moonlight. > > cheers, > > Magnus > > > On 2 Mar 2012, at 2:26:14, Michael O'Brien wrote: > > Chris, > > Those photos are amazing! And they brings up an interesting general > question about nocturnal migration by raptors. How much do they move at > night? In Cape May I see plenty of evidence of at least limited nocturnal > movement. We regularly see American Kestrels, Sharp-shinned Hawks, and > Northern Harriers present in numbers (sometimes already high overhead) at > first light when they were not present the day before. Also I have seen > Osprey and Peregrine head out in apparent migration flight over Delaware > Bay well after sunset. But the only nocturnal flight call I have heard from > a raptor was from an Osprey which gave acouple of "tew" calls overhead a > good two hours before sunrise. I wonder if others have seen or heard > evidence of nocturnal migration by raptors. > > thanks, > Michael > > Michael O'Brien > Victor Emanuel Nature Tours > www.ventbird.com > -- > *From: *"Christopher T. Tessaglia-Hymes" > *To: *"NFC-L" > *Sent: *Thursday, March 1, 2012 4:01:22 PM > *Subject: *Re: [nfc-l] Night Migrating Raptors > > Below is a link of a few pictures I managed to capture of a couple of the > individuals. Unfortunately, due to our operations, I was not able to take > time for extensive documentation. It was a very neat spectacle to have > witnessed. Some details are at right of the album at the link, below. > > https://picasaweb.google.com/112522159565855378380/NightMigratingRaptors > > Sincerely, > Chris T-H > Currently at sea in the Gulf of Mexico, aboard the M/V Emily Bordelon. > > > > On Mar 1, 2012, at 4:41 AM, Christopher T. Tessaglia-Hymes wrote: > > Although these birds weren’t making vocalizations, but it has been > really cool to witness. > > I’m on the M/V Emily Bordelon about 150 miles WNW of Tampa, FL, working on > recovering oceanographic research instruments. We’re conducting 24-hour > operations with deck lights blazing. from approximately 07:10 to 07:25 GMT > (02:10 to 02:25 AM EST) the deck crew and I observed at least three > simultaneous SWALLOW-TAILED KITES, 1 Laughing Gull, and a single OSPREY > approach the vessel during an extended
Re: [nfc-l] Night Migrating Raptors
I have sometimes heard Peregrines while recording nocturnal migration, and I know that Sergey Gashkov in Tomsk, Siberia has also recorded them. However, there is no guarantee that these Peregrines were migrating. Here in Portugal, our Peregrines are resident. I have also seen at least one from the Arctic during the non-breeding season, and F p calidus are probably regular migrants in small numbers. However, I would guess that the sounds I have heard are from local birds interacting while hunting numerous migrating Turtle Doves, with the help of streetlights or moonlight. cheers, Magnus On 2 Mar 2012, at 2:26:14, Michael O'Brien wrote: > Chris, > > Those photos are amazing! And they brings up an interesting general question > about nocturnal migration by raptors. How much do they move at night? In Cape > May I see plenty of evidence of at least limited nocturnal movement. We > regularly see American Kestrels, Sharp-shinned Hawks, and Northern Harriers > present in numbers (sometimes already high overhead) at first light when they > were not present the day before. Also I have seen Osprey and Peregrine head > out in apparent migration flight over Delaware Bay well after sunset. But the > only nocturnal flight call I have heard from a raptor was from an Osprey > which gave acouple of "tew" calls overhead a good two hours before sunrise. I > wonder if others have seen or heard evidence of nocturnal migration by > raptors. > > thanks, > Michael > > Michael O'Brien > Victor Emanuel Nature Tours > www.ventbird.com > From: "Christopher T. Tessaglia-Hymes" > To: "NFC-L" > Sent: Thursday, March 1, 2012 4:01:22 PM > Subject: Re: [nfc-l] Night Migrating Raptors > > Below is a link of a few pictures I managed to capture of a couple of the > individuals. Unfortunately, due to our operations, I was not able to take > time for extensive documentation. It was a very neat spectacle to have > witnessed. Some details are at right of the album at the link, below. > > https://picasaweb.google.com/112522159565855378380/NightMigratingRaptors > > Sincerely, > Chris T-H > Currently at sea in the Gulf of Mexico, aboard the M/V Emily Bordelon. > > > > On Mar 1, 2012, at 4:41 AM, Christopher T. Tessaglia-Hymes wrote: > > Although these birds weren’t making vocalizations, but it has been really > cool to witness. > > I’m on the M/V Emily Bordelon about 150 miles WNW of Tampa, FL, working on > recovering oceanographic research instruments. We’re conducting 24-hour > operations with deck lights blazing. from approximately 07:10 to 07:25 GMT > (02:10 to 02:25 AM EST) the deck crew and I observed at least three > simultaneous SWALLOW-TAILED KITES, 1 Laughing Gull, and a single OSPREY > approach the vessel during an extended full-stop drifts. This was at about > N28 26.491 by W85 27.459. I managed to get some half-decent photos of the > Kites as they drifted over the vessel. > > At another point, from approximately 08:40 to 09:20 GMT (02:40 to 03:20 AM > EST) we were visited by at least two more night migrating SWALLOW-TAILED > KITES. I did not obtain photos of those birds. This was at about N28 17.256 > by W85 32.837. > > I imagine there are several birds in migration across the Eastern Gulf of > Mexico at this point and we should expect to have more observations at the > next couple of nighttime stations. > > Good birding! > > Sincerely, > Chris T-H > > -- > Christopher T. Tessaglia-Hymes > TARU Product Line Manager and Field Applications Engineer > Bioacoustics Research Program, Cornell Lab of Ornithology > 159 Sapsucker Woods Road, Ithaca, New York 14850 > W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 > http://www.birds.cornell.edu/brp > > > -- > NFC-L List Info: > Welcome and Basics > Rules and Information > Subscribe, Configuration and Leave > Archives: > The Mail Archive > Surfbirds > BirdingOnThe.Net > Please submit your observations to eBird! > -- > > -- > Christopher T. Tessaglia-Hymes > TARU Product Line Manager and Field Applications Engineer > Bioacoustics Research Program, Cornell Lab of Ornithology > 159 Sapsucker Woods Road, Ithaca, New York 14850 > W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 > http://www.birds.cornell.edu/brp > > -- > NFC-L List Info: > Welcome and Basics > Rules and Information > Subscribe, Configuration and Leave > Archives: > The Mail Archive > Surfbirds > BirdingOnThe.Net > Please submit your observations to eBird! > -- > -- > NFC-L List Info: > Welcome and Basics > Rules and Information > Subscribe, Configuration and Leave > Archives: > The Mail Archive >
RE: [nfc-l] Night Migrating Raptors
Anyone else see a really beautiful telemetry/GPS study in this? When I’ve tracked raptors, they’ve been relatively silent. One little peregrine I tracked did not move more than 5 miles overnight. Probably less than 1 mile. Another one we tracked moved, we think, more than 20 on a good thermal front. Both in the fall. The one that stayed put was on a calm evening. ~Caitlin From: bounce-41633657-10103...@list.cornell.edu [mailto:bounce-41633657-10103...@list.cornell.edu] On Behalf Of Michael O'Brien Sent: Thursday, March 01, 2012 6:26 PM To: Christopher T. Tessaglia-Hymes Cc: NFC-L Subject: Re: [nfc-l] Night Migrating Raptors Chris, Those photos are amazing! And they brings up an interesting general question about nocturnal migration by raptors. How much do they move at night? In Cape May I see plenty of evidence of at least limited nocturnal movement. We regularly see American Kestrels, Sharp-shinned Hawks, and Northern Harriers present in numbers (sometimes already high overhead) at first light when they were not present the day before. Also I have seen Osprey and Peregrine head out in apparent migration flight over Delaware Bay well after sunset. But the only nocturnal flight call I have heard from a raptor was from an Osprey which gave acouple of "tew" calls overhead a good two hours before sunrise. I wonder if others have seen or heard evidence of nocturnal migration by raptors. thanks, Michael Michael O'Brien Victor Emanuel Nature Tours www.ventbird.com _ From: "Christopher T. Tessaglia-Hymes" To: "NFC-L" Sent: Thursday, March 1, 2012 4:01:22 PM Subject: Re: [nfc-l] Night Migrating Raptors Below is a link of a few pictures I managed to capture of a couple of the individuals. Unfortunately, due to our operations, I was not able to take time for extensive documentation. It was a very neat spectacle to have witnessed. Some details are at right of the album at the link, below. https://picasaweb.google.com/112522159565855378380/NightMigratingRaptors Sincerely, Chris T-H Currently at sea in the Gulf of Mexico, aboard the M/V Emily Bordelon. On Mar 1, 2012, at 4:41 AM, Christopher T. Tessaglia-Hymes wrote: Although these birds weren’t making vocalizations, but it has been really cool to witness. I’m on the M/V Emily Bordelon about 150 miles WNW of Tampa, FL, working on recovering oceanographic research instruments. We’re conducting 24-hour operations with deck lights blazing. from approximately 07:10 to 07:25 GMT (02:10 to 02:25 AM EST) the deck crew and I observed at least three simultaneous SWALLOW-TAILED KITES, 1 Laughing Gull, and a single OSPREY approach the vessel during an extended full-stop drifts. This was at about N28 26.491 by W85 27.459. I managed to get some half-decent photos of the Kites as they drifted over the vessel. At another point, from approximately 08:40 to 09:20 GMT (02:40 to 03:20 AM EST) we were visited by at least two more night migrating SWALLOW-TAILED KITES. I did not obtain photos of those birds. This was at about N28 17.256 by W85 32.837. I imagine there are several birds in migration across the Eastern Gulf of Mexico at this point and we should expect to have more observations at the next couple of nighttime stations. Good birding! Sincerely, Chris T-H -- Christopher T. Tessaglia-Hymes TARU Product Line Manager and Field Applications Engineer Bioacoustics Research Program, Cornell Lab of Ornithology 159 Sapsucker Woods Road, Ithaca, New York 14850 W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 http://www.birds.cornell.edu/brp -- NFC-L List Info: <http://www.northeastbirding.com/NFC_WELCOME> Welcome and Basics <http://www.northeastbirding.com/NFC_RULES> Rules and Information <http://www.northeastbirding.com/NFC-L_SubscribeConfigurationLeave.htm> Subscribe, Configuration and Leave Archives: <http://www.mail-archive.com/nfc-l@cornell.edu/maillist.html> The Mail Archive <http://www.surfbirds.com/birdingmail/Group/NFC-L> Surfbirds <http://birdingonthe.net/mailinglists/NFCL.html> BirdingOnThe.Net Please submit your observations to eBird <http://ebird.org/content/ebird/> ! -- -- Christopher T. Tessaglia-Hymes TARU Product Line Manager and Field Applications Engineer Bioacoustics Research Program, Cornell Lab of Ornithology 159 Sapsucker Woods Road, Ithaca, New York 14850 W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 http://www.birds.cornell.edu/brp -- NFC-L List Info: <http://www.northeastbirding.com/NFC_WELCOME> Welcome and Basics <http://www.northeastbirding.com/NFC_RULES> Rules and Information <http://www.northeastbirding.com/NFC-L_SubscribeConfigurationLeave.htm> Subscribe, Configuration and Leave Archives: <http://www.mail-archive.com/nfc-l@cornell.edu/maillist.html> The Mail Archive <
Re: [nfc-l] Night Migrating Raptors
Awesome pictures, Chris. Michael, I recorded a calling Osprey on 4/16/11 at about midnight. However, I'm not completely convinced it's of an overflying migrant because it sounds relatively close to the microphone and there are nesting Ospreys close by. Still, it's the only Osprey vocalization I've found from that microphone (again, with nesting Ospreys very near) so I'm not exactly sure what to make of it. Does anyone know about the amount of vocalizing territorial Ospreys do at night? I've attached the recording. Benjamin On Thu, Mar 1, 2012 at 9:26 PM, Michael O'Brien wrote: > Chris, > > Those photos are amazing! And they brings up an interesting general > question about nocturnal migration by raptors. How much do they move at > night? In Cape May I see plenty of evidence of at least limited nocturnal > movement. We regularly see American Kestrels, Sharp-shinned Hawks, and > Northern Harriers present in numbers (sometimes already high overhead) at > first light when they were not present the day before. Also I have seen > Osprey and Peregrine head out in apparent migration flight over Delaware > Bay well after sunset. But the only nocturnal flight call I have heard from > a raptor was from an Osprey which gave acouple of "tew" calls overhead a > good two hours before sunrise. I wonder if others have seen or heard > evidence of nocturnal migration by raptors. > > thanks, > Michael > > Michael O'Brien > Victor Emanuel Nature Tours > www.ventbird.com > -- > *From: *"Christopher T. Tessaglia-Hymes" > *To: *"NFC-L" > *Sent: *Thursday, March 1, 2012 4:01:22 PM > *Subject: *Re: [nfc-l] Night Migrating Raptors > > > Below is a link of a few pictures I managed to capture of a couple of the > individuals. Unfortunately, due to our operations, I was not able to take > time for extensive documentation. It was a very neat spectacle to have > witnessed. Some details are at right of the album at the link, below. > > https://picasaweb.google.com/112522159565855378380/NightMigratingRaptors > > Sincerely, > Chris T-H > Currently at sea in the Gulf of Mexico, aboard the M/V Emily Bordelon. > > > > On Mar 1, 2012, at 4:41 AM, Christopher T. Tessaglia-Hymes wrote: > > Although these birds weren’t making vocalizations, but it has been > really cool to witness. > > I’m on the M/V Emily Bordelon about 150 miles WNW of Tampa, FL, working > on recovering oceanographic research instruments. We’re conducting 24-hour > operations with deck lights blazing. from approximately 07:10 to 07:25 GMT > (02:10 to 02:25 AM EST) the deck crew and I observed at least three > simultaneous SWALLOW-TAILED KITES, 1 Laughing Gull, and a single OSPREY > approach the vessel during an extended full-stop drifts. This was at about > N28 26.491 by W85 27.459. I managed to get some half-decent photos of the > Kites as they drifted over the vessel. > > At another point, from approximately 08:40 to 09:20 GMT (02:40 to 03:20 > AM EST) we were visited by at least two more night migrating SWALLOW-TAILED > KITES. I did not obtain photos of those birds. This was at about N28 17.256 > by W85 32.837. > > I imagine there are several birds in migration across the Eastern Gulf > of Mexico at this point and we should expect to have more observations at > the next couple of nighttime stations. > > Good birding! > > Sincerely, > Chris T-H > > -- > Christopher T. Tessaglia-Hymes > TARU Product Line Manager and Field Applications Engineer > Bioacoustics Research Program, Cornell Lab of Ornithology > 159 Sapsucker Woods Road, Ithaca, New York 14850 > W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 > http://www.birds.cornell.edu/brp > > > -- > *NFC-L List Info:* > Welcome and Basics <http://www.northeastbirding.com/NFC_WELCOME> > Rules and Information <http://www.northeastbirding.com/NFC_RULES> > Subscribe, Configuration and > Leave<http://www.northeastbirding.com/NFC-L_SubscribeConfigurationLeave.htm> > *Archives:* > The Mail Archive<http://www.mail-archive.com/nfc-l@cornell.edu/maillist.html> > Surfbirds <http://www.surfbirds.com/birdingmail/Group/NFC-L> > BirdingOnThe.Net <http://birdingonthe.net/mailinglists/NFCL.html> > *Please submit your observations to eBird<http://ebird.org/content/ebird/> > !* > -- > > > -- > Christopher T. Tessaglia-Hymes > TARU Product Line Manager and Field Applications Engineer > Bioacoustics Research Program, Cornell Lab of Ornithology > 159 Sapsucker Woods Road, Ithaca, New York 14850 > W: 607-254-2418 M: 607-351-5740 F: 607-254-1132 > http://www.birds.cornell.edu/brp > > -- > *NFC-L List Info:*
