[TN-Bird] Re: AOU Check List 47th Supplement published
- From: Bill Pulliam <bb551@xxxxxxxxxxxxx>
- To: TN-Bird <tn-bird@xxxxxxxxxxxxx>
- Date: Fri, 7 Jul 2006 11:18:19 -0500
Concerning the Red Crossbills, there are actually morphological
differences between the potential species (including size, bill
shape). If the split happens, I suspect birders will be able to
figure out ways to make them field-identifiable. That's what we do,
after all. There are also habitat differences that will give clues,
even if they can't be definitive. It might be a good idea to start
studying and paying attention NOW before the split happens. I found
in Colorado that "type 2" and "type 5" crossbills could be
distinguished in the field much of the time, with moderate
confidence, after some practice.
Bill Pulliam
Hohenwald TN
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