[obol] Re: The Sisters "Carpodacus" that was....
- From: Brandon Green <brandon.green18@xxxxxxxxx>
- To: OBOL <obol@xxxxxxxxxxxxx>
- Date: Wed, 18 Jun 2014 15:10:24 -0700
Both Purple and Cassin's Finches have appreciable plumage variation, which
can cause confusion. Cassin's Finches sometimes hold their crown feathers
flush, and do not always appear to be "crested" (especially in individual
snapshots).
The field marks that tend to be more reliable are bill length/shape and, as
Tom mentioned, primary projection. You're not going to see much
variability there, especially among adults.
I also agree with Tom that "the best" field guide is multiple field guides.
Each have their strengths and weaknesses.
Brandon
Eugene
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