RE: Squirrels and birds give position away.
I had a squirrel start barking the other day and sure enough a doe emerged from a cornfield by the corner i was sitting in. The squirrel chirped for about 3 or 4 minutes before the deer appeared to me. I really never had a squirrel bark at me. I even swung an arrow at one the other day cause it tried to get in my stand. It just left the tree and went about his business.