Parakeets can catch yawns from their neighbors

A yawn can spread from parakeet to parakeet, even when the two aren't nuzzling noses.
Eric Kilby/Flickr (CC BY-SA 2.0)
A yawn can spread from parakeet to parakeet, even when the two aren't nuzzling noses.
Eric Kilby/Flickr (CC BY-SA 2.0)