One relatively easy way to examine trends of population decline (and increase) is to examine 35 years worth of published annual Christmas Count results. Many of the counts in NYS have been carried on in the same territories for decades. I did something like that (not written anywhere) for the Mockingbird and Red-Bellied Woodpecker for the Peekskill and Putnam CBCs. Neither bird was present before 1960. Both species have increased dramatically from single individuals in about 1960 (a steep graph for the first fifteen years). Similar increases in winter populations of Turkey Vultures, Black Vultures and Red-Tailed Hawks might be noted. CBC examination would show crashes of Eastern Screech Owl populations and declines of many other species.
-----Original Message----- From: birderlarry <birderla...@verizon.net> To: Linda Orkin <wingmagi...@gmail.com>; CAYUGABIRDS-L <cayugabird...@list.cornell.edu>; cny-naturalhistory <cny-naturalhist...@darkstar.cortland.edu>; nysbirds-l <nysbirds-l@cornell.edu> Sent: Thu, Apr 12, 2012 5:13 pm Subject: Re: [nysbirds-l] OT: Guide to Birding in the Cayuga Lake Basin article Sue, et al, In 2007, National Audubon released the State of the Birds and Common Birds in Decline. In this report, among lots of other data is data re: winter shifts of territories. Larry Federman Education Coordinator Audubon NY Rheinstrom Hill, Buttercup Farm, RamsHorn-Livingston Audubon Centers and Sanctuaries Sent from my Verizon Wireless BlackBerry From: Linda Orkin <wingmagi...@gmail.com> Sender: bounce-47216062-3714...@list.cornell.edu Date: Wed, 11 Apr 2012 12:37:06 -0400 To: CAYUGABIRDS-L<cayugabird...@list.cornell.edu>; <cny-naturalhist...@darkstar.cortland.edu>; nysbirds-l<NYSBIRDS-L@cornell.edu> ReplyTo: Linda Orkin <wingmagi...@gmail.com> Subject: [nysbirds-l] OT: Guide to Birding in the Cayuga Lake Basin article For those who may be interested, Sue Heavenrich has written an article about this Guide and it appears in this week's Tompkins County Weekly. A good overview of the book. Here is a link to the pdf page. http://www.tompkinshosting.com/tompkinsweekly/TompkinsWeekly120409.pdf Also, she had emailed me with the following request which I forward in the event that someone may wish to help her with this. I am reluctant to just give out names of people to her without some expression of interest beforehand. If anyone does want to take this on, please email me and I will put you in touch with her. Now I have another question for you - or maybe I already asked it & we didn't have time to explore: Does anyone in the club have bird count numbers or data that might show whether/how bird populations have changed over past 35 years? Am working on something re: climate change & bird range expansion or northward expansion.... ~Sue Thanks in advance if you can help out. LInda Orkin Ithaca, NY -- NYSbirds-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! -- -- NYSbirds-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! -- -- NYSbirds-L List Info: http://www.NortheastBirding.com/NYSbirdsWELCOME http://www.NortheastBirding.com/NYSbirdsRULES 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://birdingonthe.net/mailinglists/NYSB.html Please submit your observations to eBird: http://ebird.org/content/ebird/ --
