[cayugabirds-l] Crests

2011-01-13 Thread Carol Keeler
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

Re: [cayugabirds-l] Crests

2011-01-13 Thread Asher Hockett
I think some birds may show a crest when the feathers on the head have been disturbed mechanically - blown by the wind or moved by contact with a branch or another bird. Crested birds have feathers structured to make the crest and some can raise or lower it with the underlying musculature. Some

RE: [cayugabirds-l] Crests

2011-01-13 Thread Marie P Read
Subject: [cayugabirds-l] Crests 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