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 <jay_bird...@yahoo.com> 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 <mlanz...@gmail.com> > *To:* Ted Floyd <tfl...@aba.org> > *Cc:* Magnus Robb <magnus.r...@me.com>; Michael O'Brien < > tsw...@comcast.net>; Christopher T. Tessaglia-Hymes <c...@cornell.edu>; > NFC-L <nf...@list.cornell.edu> > *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 <tfl...@aba.org> 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" <c...@cornell.edu> > *To: *"NFC-L" <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/content/ebird/> > !* > -- > -- > *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/> > !* > -- > > > -- > *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/> > !* > -- > -- > *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/> > !* > -- > > > -- > *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/> > !* > -- > > > -- > *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/> > !* > -- > -- NFC-L List Info: http://www.NortheastBirding.com/NFC_WELCOME http://www.NortheastBirding.com/NFC_RULES http://www.NortheastBirding.com/NFC-L_SubscribeConfigurationLeave.htm ARCHIVES: 1) http://www.mail-archive.com/nfc-l@cornell.edu/maillist.html 2) http://www.surfbirds.com/birdingmail/Group/NFC-L 3) http://birdingonthe.net/mailinglists/NFCL.html Please submit your observations to eBird: http://ebird.org/content/ebird/ --
