RE: [nysbirds-l] Crossbill question

2013-02-21 Thread Matthew A. Young
...@list.cornell.edu] on behalf of Peter Post [pwp...@nyc.rr.com] 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

Re: [nysbirds-l] Crossbill question

2013-02-21 Thread Peter Post
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 pwp...@nyc.rr.com On Feb 21, 2013, at 9:19 AM, greg

RE: [nysbirds-l] Crossbill question

2013-02-21 Thread Joan E. Collins
Hi Greg/All, Very observant! It is not 50-50, at least for White-winged Crossbill. Info from the Birds of North America White-winged Crossbill account: "Lower mandible crosses to right approximately 3 times more often than to left (Benkman 1988c

RE: [nysbirds-l] Crossbill question

2013-02-21 Thread Joan E. Collins
Hi Greg/All, Very observant! It is not 50-50, at least for White-winged Crossbill. Info from the Birds of North America White-winged Crossbill account: Lower mandible crosses to right approximately 3 times more often than to left (Benkman 1988c

Re: [nysbirds-l] Crossbill question

2013-02-21 Thread Peter Post
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 pwp...@nyc.rr.com On Feb 21, 2013, at 9:19 AM, greg

RE: [nysbirds-l] Crossbill question

2013-02-21 Thread Matthew A. Young
...@list.cornell.edu] on behalf of Peter Post [pwp...@nyc.rr.com] 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