ANSWERS: 5
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I've only seen flamingo birds do this. I think that signals to other birds that they are asleep and don't bother them. They have folded up shop. Good night!
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I never heard that!
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To conserve body heat by minimising contact with the ground. If they stood on two legs it would be twice as much skin surface on the cold ground (and possibly in the water) so twice as much heat transfer/ loss.
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Most of them don't.
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The other leg is holding the gun.
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