Hello all, In case there's some that don't know, cut and past both parts of link in Peter's post for it to work. It was broken up into two lines for me.
I had privately passed on this email to Greg early this morning: Hi Greg, In Red Crossbills the ratio is 1:1 but in WW Crossbills the ratio is 3:1, but I can't remember off top of my head in what direction. I think it crosses 3:1 left to right in WW Crossbills. cheers, Matt Lastly, we should start to see a return flight of crossbills and other finches starting next week. I'd like to remind everyone to continue to get crossbill recordings for analysis -- I'd like to take a look and listen at any recordings. I'd like to also pass on the reminder that most smartphones can get adequate recordings for analysis. So far here in the northern and eastern States, most of this historic flight has been made up of Type 3 with a nice sprinkling of Type 10 and a few 2 and 1. We're likely to see much of the same in the return flight, but you never know unless we get recordings.......many Type 2 and a few type 5 also moved out into the plains States, and perhaps we'll get more Type 2s here in the northeast in the return flight. For more on Crossbill flight call ID and Status, see my October eBird crossbill piece: http://ebird.org/content/ebird/news/red-crossbill-types cheers, Matt Young ________________________________________ From: [email protected] [[email protected]] on behalf of Peter Post [[email protected]] Sent: Thursday, February 21, 2013 12:46 PM To: greg prelich Cc: NYSBIRDS-L Subject: Re: [nysbirds-l] Crossbill question See: Groth J.G. 1992. Further Information on the Genetics of Bill Crossing in Crossbills. Auk 109 (2): 385-389. which can be found at: http://sora.unm.edu/sites/default/files/journals/auk/v109n02/p0383- p0385.pdf Peter Post New York City [email protected] On Feb 21, 2013, at 9:19 AM, greg prelich wrote: > I've been looking at some photos I took recently of Crossbills and > noticed that on one bird the upper mandible crosses over the right > side of the lower mandible and on another bird it crosses on the > left. Does anybody out there know if there is a preference either > way, or is it a 50% proposition? > > Greg Prelich > New Rochelle > -- > 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/[email protected]/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/ -- -- 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/[email protected]/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/ --
