[nysbirds-l] Stone Bridge Nighthawk Watch
The Nighthawk Watch was productive tonight. We had 156 nighthawks, often with a dozen birds in view at one time; another bird with no tail! The red bat appeared again. John Turner -- NYSbirds-L List Info: http://www.NortheastBirding.com/NYSbirdsWELCOME.htm http://www.NortheastBirding.com/NYSbirdsRULES.htm http://www.NortheastBirding.com/NYSbirdsSubscribeConfigurationLeave.htm ARCHIVES: 1) http://www.mail-archive.com/nysbirds-l@cornell.edu/maillist.html 2) http://www.surfbirds.com/birdingmail/Group/NYSBirds-L 3) http://birding.aba.org/maillist/NY01 Please submit your observations to eBird: http://ebird.org/content/ebird/ --
Re: [nysbirds-l] Fwd: News Alert: North America has lost 29% of its birds since 1970, study finds. Experts blame habitat loss, pesticides, light pollution and cats.
Hi Gus, I really think it's just an artifact of the way the figure was made, and not something with a complicated biological explanation. To me it looks like a simple function that illustrates the entire estimated decline from 10 to 7, as though the current population size was the end point. In other words, the graphic looks like the exponential loss of 3 billion birds, starting with all of the 3 billion birds that used to exist, to the zero of those birds that remain today. Shai ___ From: Gus Keri [gusk...@zoho.com] Sent: Sunday, September 22, 2019 12:35 PM To: Shaibal Mitra Cc: NYSBIRDS (NYSBIRDS-L@cornell.edu) Subject: RE: [nysbirds-l] Fwd: News Alert: North America has lost 29% of its birds since 1970, study finds. Experts blame habitat loss, pesticides, light pollution and cats. Hi Shaibal, I took into consideration the possibility of exponential decline but it didn't look like that. If you calculate the decline in relation to the absolute number of birds at the beginning of each decade, the difference is more remarkable. Here is the percentage of decline for each decade alone: By the end of the 70s: 12% By the end of the 80s: 9% By the end of the 90s: 7% BY the end if the 2000s: 4% By now: 1-2% I don't know if birds are finding a way to adjust with all the environmental changes that are taking place, or there are other factors involved. Sent using Zoho Mail On Sun, 22 Sep 2019 12:01:35 -0400 Shaibal Mitra wrote > Hi Gus and all, > > The curve in the link has the shape characteristic of exponential decline at > a constant rate. It has the properties you describe, with the amount of > absolute loss diminishing in the recent years, because the population itself > is getting smaller all the time. I suspect that this graphic is not to be > taken literally but instead is a simple, fitted function meant to express > the overall rate of loss that was estimated over these decades. > > Best, > Shai > > From: bounce-123944861-3714...@list.cornell.edu > [bounce-123944861-3714...@list.cornell.edu] on behalf of Gus Keri > [gusk...@zoho.com] > Sent: Saturday, September 21, 2019 6:57 PM > To: Anne Swaim > Cc: NYSBIRDS-L-for posts posts; Birding alert, ebirdsNYC, Birding alert > Subject: Re: [nysbirds-l] Fwd: News Alert: North America has lost 29% of its > birds since 1970, study finds. Experts blame habitat loss, pesticides, light > pollution and cats. > > https://www.allaboutbirds.org/vanishing-1-in-4-birds-gone/ > > The shape of the curve on the graphic in the above article is very > intriguing to me. It starts with a steep decline in the first couple of > decades and plateaued toward the last few years. > The curve suggests that more than 75% of birds losses happened in the first > 25 years (betwween 1970 and 1995) and less than 25% of the losses took place > in the last 25 years(from 1995 to present). > The fact that habitat loss, climate changes and other adverse environmental > changes are worse in the last 25 years compared to the previous period > suggests other factors are at play to slow down the decline of the total > population. > Does anyone have any explanation for this contradiction? > > Sent using Zoho Mail > > > On Fri, 20 Sep 2019 07:18:43 -0400 Anne Swaim > wrote > > The unformatted PDF version of the study is now openly linked on Cornell > Lab's website > here:https://www.birds.cornell.edu/home/wp-content/uploads/2019/09/DECLINE-OF-NORTH-AMERICAN-AVIFAUNA-SCIENCE-2019.pdfand > also linked from accompanying Living Birds article > here:https://www.allaboutbirds.org/vanishing-1-in-4-birds-gone/ > > > > Anne SwaimSaw Mill River Audubonwww.sawmillriveraudubon.org > > > > > > > > On Thu, Sep 19, 2019 at 9:29 PM Anne Swaim wrote: > > Further on this topic: someone just passed along a PDF of full text of > the study. > > Reply off list, if a copy would be of interest. > > Anne SwaimSaw Mill River Audubonwww.sawmillriveraudubon.org > > > > > > -- NYSbirds-L > List Info: Welcome and Basics > Rules and Information >Subscribe, Configuration and Leave > Archives: The Mail Archive >Surfbirds > ABA Please submit your observations to > eBird! -- > > > -- > > NYSbirds-L List Info: > http://www.NortheastBirding.com/NYSbirdsWELCOME.htm > http://www.NortheastBirding.com/NYSbirdsRULES.htm > http://www.NortheastBirding.com/NYSbirdsSubscribeConfigurationLeave.htm > > ARCHIVES: > 1) http://www.ma
[nysbirds-l] East Pond South End Queens
A very fast survey (1 hour total) from the south end to the raunt and back turned up: South end: 1 Hudsonian Godwit 7 Stilt Sandpipers 6 Short-billed Dowitchers Raunt 1 Caspian Tern 1 adult Bald Eagle All of the common shorebirds you'd expect save: 0 White-rumped 0 Western Sandpiper 0 Pectoral Sandpiper. Surely with a bit more time more could be found. Good birding, Tripper -- NYSbirds-L List Info: http://www.NortheastBirding.com/NYSbirdsWELCOME.htm http://www.NortheastBirding.com/NYSbirdsRULES.htm http://www.NortheastBirding.com/NYSbirdsSubscribeConfigurationLeave.htm ARCHIVES: 1) http://www.mail-archive.com/nysbirds-l@cornell.edu/maillist.html 2) http://www.surfbirds.com/birdingmail/Group/NYSBirds-L 3) http://birding.aba.org/maillist/NY01 Please submit your observations to eBird: http://ebird.org/content/ebird/ --
RE: [nysbirds-l] Fwd: News Alert: North America has lost 29% of its birds since 1970, study finds. Experts blame habitat loss, pesticides, light pollution and cats.
Hi Shaibal, I took into consideration the possibility of exponential decline but it didn't look like that. If you calculate the decline in relation to the absolute number of birds at the beginning of each decade, the difference is more remarkable. Here is the percentage of decline for each decade alone: By the end of the 70s: 12% By the end of the 80s: 9% By the end of the 90s: 7% BY the end if the 2000s: 4% By now: 1-2% I don't know if birds are finding a way to adjust with all the environmental changes that are taking place, or there are other factors involved. Sent using Zoho Mail On Sun, 22 Sep 2019 12:01:35 -0400 Shaibal Mitra wrote > Hi Gus and all, > > The curve in the link has the shape characteristic of exponential decline at > a constant rate. It has the properties you describe, with the amount of > absolute loss diminishing in the recent years, because the population itself > is getting smaller all the time. I suspect that this graphic is not to be > taken literally but instead is a simple, fitted function meant to express > the overall rate of loss that was estimated over these decades. > > Best, > Shai > > From: bounce-123944861-3714...@list.cornell.edu > [bounce-123944861-3714...@list.cornell.edu] on behalf of Gus Keri > [gusk...@zoho.com] > Sent: Saturday, September 21, 2019 6:57 PM > To: Anne Swaim > Cc: NYSBIRDS-L-for posts posts; Birding alert, ebirdsNYC, Birding alert > Subject: Re: [nysbirds-l] Fwd: News Alert: North America has lost 29% of its > birds since 1970, study finds. Experts blame habitat loss, pesticides, light > pollution and cats. > > https://www.allaboutbirds.org/vanishing-1-in-4-birds-gone/ > > The shape of the curve on the graphic in the above article is very > intriguing to me. It starts with a steep decline in the first couple of > decades and plateaued toward the last few years. > The curve suggests that more than 75% of birds losses happened in the first > 25 years (betwween 1970 and 1995) and less than 25% of the losses took place > in the last 25 years(from 1995 to present). > The fact that habitat loss, climate changes and other adverse environmental > changes are worse in the last 25 years compared to the previous period > suggests other factors are at play to slow down the decline of the total > population. > Does anyone have any explanation for this contradiction? > > Sent using Zoho Mail > > > On Fri, 20 Sep 2019 07:18:43 -0400 Anne Swaim > wrote > > The unformatted PDF version of the study is now openly linked on Cornell > Lab's website > here:https://www.birds.cornell.edu/home/wp-content/uploads/2019/09/DECLINE-OF-NORTH-AMERICAN-AVIFAUNA-SCIENCE-2019.pdfand > also linked from accompanying Living Birds article > here:https://www.allaboutbirds.org/vanishing-1-in-4-birds-gone/ > > > > Anne SwaimSaw Mill River Audubonwww.sawmillriveraudubon.org > > > > > > > > On Thu, Sep 19, 2019 at 9:29 PM Anne Swaim wrote: > > Further on this topic: someone just passed along a PDF of full text of > the study. > > Reply off list, if a copy would be of interest. > > Anne SwaimSaw Mill River Audubonwww.sawmillriveraudubon.org > > > > > > -- NYSbirds-L > List Info: Welcome and Basics > Rules and Information >Subscribe, Configuration and Leave > Archives: The Mail Archive >Surfbirds > ABA Please submit your observations to > eBird! -- > > > -- > > NYSbirds-L List Info: > http://www.NortheastBirding.com/NYSbirdsWELCOME.htm > http://www.NortheastBirding.com/NYSbirdsRULES.htm > http://www.NortheastBirding.com/NYSbirdsSubscribeConfigurationLeave.htm > > ARCHIVES: > 1) http://www.mail-archive.com/nysbirds-l@cornell.edu/maillist.html > 2) http://www.surfbirds.com/birdingmail/Group/NYSBirds-L > 3) http://birding.aba.org/maillist/NY01 > > Please submit your observations to eBird: > http://ebird.org/content/ebird/ > > -- > > -- > > NYSbirds-L List Info: > http://www.NortheastBirding.com/NYSbirdsWELCOME.htm > http://www.NortheastBirding.com/NYSbirdsRULES.htm > http://www.NortheastBirding.com/NYSbirdsSubscribeConfigurationLeave.htm > > ARCHIVES: > 1) http://www.mail-archive.com/nysbirds-l@cornell.edu/maillist.html > 2) http://www.surfbirds.com/birdingmail/Group/NYSBirds-L > 3) http://birding.aba.org/maillist/NY01 > > Please submit your observations to eBird: > http://ebird.org/content/ebird/ > > -- > > -- NYSbirds-L List Info: http://www.NortheastBirding.com/NYSbi
RE: [nysbirds-l] Fwd: News Alert: North America has lost 29% of its birds since 1970, study finds. Experts blame habitat loss, pesticides, light pollution and cats.
Hi Gus and all, The curve in the link has the shape characteristic of exponential decline at a constant rate. It has the properties you describe, with the amount of absolute loss diminishing in the recent years, because the population itself is getting smaller all the time. I suspect that this graphic is not to be taken literally but instead is a simple, fitted function meant to express the overall rate of loss that was estimated over these decades. Best, Shai From: bounce-123944861-3714...@list.cornell.edu [bounce-123944861-3714...@list.cornell.edu] on behalf of Gus Keri [gusk...@zoho.com] Sent: Saturday, September 21, 2019 6:57 PM To: Anne Swaim Cc: NYSBIRDS-L-for posts posts; Birding alert, ebirdsNYC, Birding alert Subject: Re: [nysbirds-l] Fwd: News Alert: North America has lost 29% of its birds since 1970, study finds. Experts blame habitat loss, pesticides, light pollution and cats. https://www.allaboutbirds.org/vanishing-1-in-4-birds-gone/ The shape of the curve on the graphic in the above article is very intriguing to me. It starts with a steep decline in the first couple of decades and plateaued toward the last few years. The curve suggests that more than 75% of birds losses happened in the first 25 years (betwween 1970 and 1995) and less than 25% of the losses took place in the last 25 years(from 1995 to present). The fact that habitat loss, climate changes and other adverse environmental changes are worse in the last 25 years compared to the previous period suggests other factors are at play to slow down the decline of the total population. Does anyone have any explanation for this contradiction? Sent using Zoho Mail On Fri, 20 Sep 2019 07:18:43 -0400 Anne Swaim wrote > The unformatted PDF version of the study is now openly linked on Cornell > Lab's website > here:https://www.birds.cornell.edu/home/wp-content/uploads/2019/09/DECLINE-OF-NORTH-AMERICAN-AVIFAUNA-SCIENCE-2019.pdfand > also linked from accompanying Living Birds article > here:https://www.allaboutbirds.org/vanishing-1-in-4-birds-gone/ > > Anne SwaimSaw Mill River Audubonwww.sawmillriveraudubon.org > > > > On Thu, Sep 19, 2019 at 9:29 PM Anne Swaim wrote: > Further on this topic: someone just passed along a PDF of full text of the > study. > Reply off list, if a copy would be of interest. > Anne SwaimSaw Mill River Audubonwww.sawmillriveraudubon.org > > > -- NYSbirds-L List > Info: Welcome and Basics >Rules and Information > Subscribe, Configuration and Leave > Archives: The Mail Archive >Surfbirds > ABA Please submit your observations to > eBird! -- -- NYSbirds-L List Info: http://www.NortheastBirding.com/NYSbirdsWELCOME.htm http://www.NortheastBirding.com/NYSbirdsRULES.htm http://www.NortheastBirding.com/NYSbirdsSubscribeConfigurationLeave.htm ARCHIVES: 1) http://www.mail-archive.com/nysbirds-l@cornell.edu/maillist.html 2) http://www.surfbirds.com/birdingmail/Group/NYSBirds-L 3) http://birding.aba.org/maillist/NY01 Please submit your observations to eBird: http://ebird.org/content/ebird/ -- -- NYSbirds-L List Info: http://www.NortheastBirding.com/NYSbirdsWELCOME.htm http://www.NortheastBirding.com/NYSbirdsRULES.htm http://www.NortheastBirding.com/NYSbirdsSubscribeConfigurationLeave.htm ARCHIVES: 1) http://www.mail-archive.com/nysbirds-l@cornell.edu/maillist.html 2) http://www.surfbirds.com/birdingmail/Group/NYSBirds-L 3) http://birding.aba.org/maillist/NY01 Please submit your observations to eBird: http://ebird.org/content/ebird/ --
[nysbirds-l] Western kingbird, Voorheesville
A western Kingbird found yesterday afternoon by Frank Mitchell at Black creek marsh in voorheesville, NY (Albany’s county) on the tracks west of Hennessy Road is continuing this morning, relocated by Jeremy Collison. -- Zach Schwartz-Weinstein 203 500 7774 -- NYSbirds-L List Info: http://www.NortheastBirding.com/NYSbirdsWELCOME.htm http://www.NortheastBirding.com/NYSbirdsRULES.htm http://www.NortheastBirding.com/NYSbirdsSubscribeConfigurationLeave.htm ARCHIVES: 1) http://www.mail-archive.com/nysbirds-l@cornell.edu/maillist.html 2) http://www.surfbirds.com/birdingmail/Group/NYSBirds-L 3) http://birding.aba.org/maillist/NY01 Please submit your observations to eBird: http://ebird.org/content/ebird/ --
[nysbirds-l] Radar map
https://www.pauljhurtado.com/US_Composite_Radar/2019-9-21/ There is a lot of radar activities (green color) in NYC and the Tristate area this early morning (2 to 4 am) suggestive of a lot of birds landing. Today looks to be a good birding day. Good luck. -- NYSbirds-L List Info: http://www.NortheastBirding.com/NYSbirdsWELCOME.htm http://www.NortheastBirding.com/NYSbirdsRULES.htm http://www.NortheastBirding.com/NYSbirdsSubscribeConfigurationLeave.htm ARCHIVES: 1) http://www.mail-archive.com/nysbirds-l@cornell.edu/maillist.html 2) http://www.surfbirds.com/birdingmail/Group/NYSBirds-L 3) http://birding.aba.org/maillist/NY01 Please submit your observations to eBird: http://ebird.org/content/ebird/ --
