I have a question. Are all birds able to raise a crest even though
they normally do not have one? Is it something that they do when they
are agitated, angry, or upset? I took a picture of an American Tree
Sparrow with a "crest". I have never seen this before with a bird
which doesn't have a crest. Maybe it's not called a crest on birds
without them.
http://www.pbase.com/carol_keeler_photo/image/131804983
This made me wonder if it is something all birds can do when so
motivated.
Carol Keeler
Auburn
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