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."

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.

2019-09-22 Thread Shaibal Mitra

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!   --
 >
 >

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.

2019-09-22 Thread Shaibal Mitra

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!   --
 >
 >

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.

2019-09-22 Thread Gus Keri

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://w

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.

2019-09-22 Thread Gus Keri

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://w

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.

2019-09-22 Thread Shaibal Mitra

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:
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ARCHIVES:
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2) http://www.surfbirds.com/birdingmail/Group/NYSBirds-L
3) http://birding.aba.org/maillist/NY01

Please submit your observations to eBird:
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--

--

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ARCHIVES:
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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.

2019-09-22 Thread Shaibal Mitra

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
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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
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ARCHIVES:
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2) http://www.surfbirds.com/birdingmail/Group/NYSBirds-L
3) http://birding.aba.org/maillist/NY01

Please submit your observations to eBird:
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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.

2019-09-21 Thread Gus Keri

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!   --

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Please submit your observations to eBird:
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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.

2019-09-21 Thread Gus Keri

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!   --

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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.

2019-09-20 Thread Anne Swaim

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.pdf
and also linked from accompanying Living Birds article here:
https://www.allaboutbirds.org/vanishing-1-in-4-birds-gone/


Anne Swaim
Saw Mill River Audubon
www.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 Swaim
> Saw Mill River Audubon
> www.sawmillriveraudubon.org
>
>
>
>

--

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Please submit your observations to eBird:
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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.

2019-09-20 Thread Anne Swaim

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.pdf
and also linked from accompanying Living Birds article here:
https://www.allaboutbirds.org/vanishing-1-in-4-birds-gone/


Anne Swaim
Saw Mill River Audubon
www.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 Swaim
> Saw Mill River Audubon
> www.sawmillriveraudubon.org
>
>
>
>

--

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Please submit your observations to eBird:
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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.

2019-09-19 Thread Anne Swaim

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 Swaim
Saw Mill River Audubon
www.sawmillriveraudubon.org

--

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Please submit your observations to eBird:
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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.

2019-09-19 Thread Anne Swaim

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 Swaim
Saw Mill River Audubon
www.sawmillriveraudubon.org

--

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Please submit your observations to eBird:
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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.

2019-09-19 Thread Purbita Saha

Adding Audubon magazine's coverage on the Cornell study as well, not for
shameless promotion but because it has a helpful graphic and also does a
by-habitat breakdown of the declines.

https://www.audubon.org/news/north-america-has-lost-more-1-4-birds-last-50-years-new-study-says


Just spent my lunch at a hawkwatch and was at least happy to see many
chimney swifts.

Happy birding (and conserving),
Purbita

On Thu, Sep 19, 2019 at 2:28 PM Andrew Baksh  wrote:

> And on that note. A call on Bronx Birders to please contact Margarita
> Eremeyev at mereme...@gmail.com
>
> She is doing extensive research on the possible adverse effects the
> planned paving of the Putnam Trail in Van Cortlandt Park in the Bronx May
> have on wildlife. For example, the Rusty Blackbirds that have utilized the
> wetland area near Tibbets Brook might be affected.
>
> There have been quite a few of us enjoying some of the birds being
> reported from that borough as of late. Please take the time out to contact
> Margarita to see if you could be of  assistance.
>
> Thank You
>
> 
> "I prefer to be true to myself, even at the hazard of incurring the
> ridicule of others, rather than to be false, and to incur my own
> abhorrence." ~ Frederick Douglass
>
> 風 Swift as the wind
> 林 Quiet as the forest
> 火 Conquer like the fire
> 山 Steady as the mountain
> Sun Tzu   *The Art of War*
> 
>
> (\__/)
> (= '.'=)
>
> (") _ (")
>
> Sent from somewhere in the field using my mobile device!
>
>
> Andrew Baksh
> www.birdingdude.blogspot.com
>
> On Sep 19, 2019, at 2:19 PM, Richard Guthrie 
> wrote:
>
>
>
> Sent from my iPhone
>
> Begin forwarded message:
>
> *From:* The Washington Post 
> *Date:* September 19, 2019 at 2:01:29 PM EDT
> *To:* richardpguth...@gmail.com
> *Subject:* *News Alert: North America has lost 29% of its birds since
> 1970, study finds. Experts blame habitat loss, pesticides, light pollution
> and cats.*
> *Reply-To:* The Washington Post 
>
> A massive study of bird populations, using decades of survey data as well
> as weather radar readings of migratory flocks, shows the United States and
> Canada have lost 3 billion birds in the past 50 years. The declines have
> hit sparrows, finches, warblers, thrushes, swallows and many other familiar
> groups.
>
> [image: The Washington Post]
> 
> Democracy Dies in Darkness
>
> *News Alert* Sep 19, 2:01 PM
>
> North America has lost 29% of its birds since 1970, study finds. Experts
> blame habitat loss, pesticides, light pollution and cats.
> 
>
> A massive study of bird populations, using decades of survey data as well
> as weather radar readings of migratory flocks, shows the United States and
> Canada have lost 3 billion birds in the past 50 years. The declines have
> hit sparrows, finches, warblers, thrushes, swallows and many other familiar
> groups.
> Read more »
> 
> Advertisement
>
> 
>
> 
> 
> You received this email because you signed up for news alerts from The
> Washington Post.
> Manage my newsletters and alerts
> 
> | Unsubscribe
> 
> Privacy Policy
> 
> | Help
> 
> ©2019 The Washington Post, 1301 K St NW, Washington DC 20071
>
> --
> *NYSbirds-L List Info:*
> Welcome and Basics 
> Rules and Information 
> Subscribe, Configuration and Leave
> 
> *Archives:*
> The Mail Archive
> 
> Surfbirds 
> ABA

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.

2019-09-19 Thread Purbita Saha

Adding Audubon magazine's coverage on the Cornell study as well, not for
shameless promotion but because it has a helpful graphic and also does a
by-habitat breakdown of the declines.

https://www.audubon.org/news/north-america-has-lost-more-1-4-birds-last-50-years-new-study-says


Just spent my lunch at a hawkwatch and was at least happy to see many
chimney swifts.

Happy birding (and conserving),
Purbita

On Thu, Sep 19, 2019 at 2:28 PM Andrew Baksh  wrote:

> And on that note. A call on Bronx Birders to please contact Margarita
> Eremeyev at mereme...@gmail.com
>
> She is doing extensive research on the possible adverse effects the
> planned paving of the Putnam Trail in Van Cortlandt Park in the Bronx May
> have on wildlife. For example, the Rusty Blackbirds that have utilized the
> wetland area near Tibbets Brook might be affected.
>
> There have been quite a few of us enjoying some of the birds being
> reported from that borough as of late. Please take the time out to contact
> Margarita to see if you could be of  assistance.
>
> Thank You
>
> 
> "I prefer to be true to myself, even at the hazard of incurring the
> ridicule of others, rather than to be false, and to incur my own
> abhorrence." ~ Frederick Douglass
>
> 風 Swift as the wind
> 林 Quiet as the forest
> 火 Conquer like the fire
> 山 Steady as the mountain
> Sun Tzu   *The Art of War*
> 
>
> (\__/)
> (= '.'=)
>
> (") _ (")
>
> Sent from somewhere in the field using my mobile device!
>
>
> Andrew Baksh
> www.birdingdude.blogspot.com
>
> On Sep 19, 2019, at 2:19 PM, Richard Guthrie 
> wrote:
>
>
>
> Sent from my iPhone
>
> Begin forwarded message:
>
> *From:* The Washington Post 
> *Date:* September 19, 2019 at 2:01:29 PM EDT
> *To:* richardpguth...@gmail.com
> *Subject:* *News Alert: North America has lost 29% of its birds since
> 1970, study finds. Experts blame habitat loss, pesticides, light pollution
> and cats.*
> *Reply-To:* The Washington Post 
>
> A massive study of bird populations, using decades of survey data as well
> as weather radar readings of migratory flocks, shows the United States and
> Canada have lost 3 billion birds in the past 50 years. The declines have
> hit sparrows, finches, warblers, thrushes, swallows and many other familiar
> groups.
>
> [image: The Washington Post]
> 
> Democracy Dies in Darkness
>
> *News Alert* Sep 19, 2:01 PM
>
> North America has lost 29% of its birds since 1970, study finds. Experts
> blame habitat loss, pesticides, light pollution and cats.
> 
>
> A massive study of bird populations, using decades of survey data as well
> as weather radar readings of migratory flocks, shows the United States and
> Canada have lost 3 billion birds in the past 50 years. The declines have
> hit sparrows, finches, warblers, thrushes, swallows and many other familiar
> groups.
> Read more »
> 
> Advertisement
>
> 
>
> 
> 
> You received this email because you signed up for news alerts from The
> Washington Post.
> Manage my newsletters and alerts
> 
> | Unsubscribe
> 
> Privacy Policy
> 
> | Help
> 
> ©2019 The Washington Post, 1301 K St NW, Washington DC 20071
>
> --
> *NYSbirds-L List Info:*
> Welcome and Basics 
> Rules and Information 
> Subscribe, Configuration and Leave
> 
> *Archives:*
> The Mail Archive
> 
> Surfbirds 
> ABA

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.

2019-09-19 Thread Andrew Baksh

And on that note. A call on Bronx Birders to please contact Margarita Eremeyev 
at mereme...@gmail.com

She is doing extensive research on the possible adverse effects the planned 
paving of the Putnam Trail in Van Cortlandt Park in the Bronx May have on 
wildlife. For example, the Rusty Blackbirds that have utilized the wetland area 
near Tibbets Brook might be affected.

There have been quite a few of us enjoying some of the birds being reported 
from that borough as of late. Please take the time out to contact Margarita to 
see if you could be of  assistance.

Thank You


"I prefer to be true to myself, even at the hazard of incurring the ridicule of 
others, rather than to be false, and to incur my own abhorrence." ~ Frederick 
Douglass

風　Swift as the wind
林　Quiet as the forest
火　Conquer like the fire
山　Steady as the mountain
Sun Tzu  The Art of War

> (\__/)
> (= '.'=)
> (") _ (") 
> Sent from somewhere in the field using my mobile device! 

Andrew Baksh
www.birdingdude.blogspot.com

> On Sep 19, 2019, at 2:19 PM, Richard Guthrie  
> wrote:
> 
> 
> 
> Sent from my iPhone
> 
> Begin forwarded message:
> 
>> From: The Washington Post 
>> Date: September 19, 2019 at 2:01:29 PM EDT
>> To: richardpguth...@gmail.com
>> Subject: News Alert: North America has lost 29% of its birds since 1970, 
>> study finds. Experts blame habitat loss, pesticides, light pollution and 
>> cats.
>> Reply-To: The Washington Post 
>> 
>> 
>>  
>> 
>> Democracy Dies in Darkness
>>  
>>  
>> News Alert   Sep 19, 2:01 PM
>>  
>>  
>> North America has lost 29% of its birds since 1970, study finds. Experts 
>> blame habitat loss, pesticides, light pollution and cats.
>> A massive study of bird populations, using decades of survey data as well as 
>> weather radar readings of migratory flocks, shows the United States and 
>> Canada have lost 3 billion birds in the past 50 years. The declines have hit 
>> sparrows, finches, warblers, thrushes, swallows and many other familiar 
>> groups.
>> 
>> Read more »
>> ADVERTISEMENT
>>
>> 
>> 
>> You received this email because you signed up for news alerts from The 
>> Washington Post.
>> Manage my newsletters and alerts | Unsubscribe
>> Privacy Policy | Help
>> ©2019 The Washington Post, 1301 K St NW, Washington DC 20071
>>  
>>   
> --
> 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:
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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.

2019-09-19 Thread Andrew Baksh

And on that note. A call on Bronx Birders to please contact Margarita Eremeyev 
at mereme...@gmail.com

She is doing extensive research on the possible adverse effects the planned 
paving of the Putnam Trail in Van Cortlandt Park in the Bronx May have on 
wildlife. For example, the Rusty Blackbirds that have utilized the wetland area 
near Tibbets Brook might be affected.

There have been quite a few of us enjoying some of the birds being reported 
from that borough as of late. Please take the time out to contact Margarita to 
see if you could be of  assistance.

Thank You


"I prefer to be true to myself, even at the hazard of incurring the ridicule of 
others, rather than to be false, and to incur my own abhorrence." ~ Frederick 
Douglass

風　Swift as the wind
林　Quiet as the forest
火　Conquer like the fire
山　Steady as the mountain
Sun Tzu  The Art of War

> (\__/)
> (= '.'=)
> (") _ (") 
> Sent from somewhere in the field using my mobile device! 

Andrew Baksh
www.birdingdude.blogspot.com

> On Sep 19, 2019, at 2:19 PM, Richard Guthrie  
> wrote:
> 
> 
> 
> Sent from my iPhone
> 
> Begin forwarded message:
> 
>> From: The Washington Post 
>> Date: September 19, 2019 at 2:01:29 PM EDT
>> To: richardpguth...@gmail.com
>> Subject: News Alert: North America has lost 29% of its birds since 1970, 
>> study finds. Experts blame habitat loss, pesticides, light pollution and 
>> cats.
>> Reply-To: The Washington Post 
>> 
>> 
>>  
>> 
>> Democracy Dies in Darkness
>>  
>>  
>> News Alert   Sep 19, 2:01 PM
>>  
>>  
>> North America has lost 29% of its birds since 1970, study finds. Experts 
>> blame habitat loss, pesticides, light pollution and cats.
>> A massive study of bird populations, using decades of survey data as well as 
>> weather radar readings of migratory flocks, shows the United States and 
>> Canada have lost 3 billion birds in the past 50 years. The declines have hit 
>> sparrows, finches, warblers, thrushes, swallows and many other familiar 
>> groups.
>> 
>> Read more »
>> ADVERTISEMENT
>>
>> 
>> 
>> You received this email because you signed up for news alerts from The 
>> Washington Post.
>> Manage my newsletters and alerts | Unsubscribe
>> Privacy Policy | Help
>> ©2019 The Washington Post, 1301 K St NW, Washington DC 20071
>>  
>>   
> --
> 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:
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ARCHIVES:
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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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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