Sunday, March 14, 2010

Can we sex crows? (5)



Unfortunately, I couldn't find the best shots of a typical male. The above two photos are of the same known individual. He looks miserable due to molting. He is a much nicer-looking guy in breeding season. Despite his condition, I think you can see the shoulder muscle is well developed.
As indicated by an arrow, his upper bill is slightly hooked and typically longer than that of the lower bill.

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