Animal Sounds

Something that I've been trying to pay attention to recently is sounds. There is an animal that lives by my building door and most nights when I go to go inside, the bushes next to me rustle (which is extremely disconcerting by the way). I've also been listening to crickets, and I find it so funny how they chirp, but when you're directly in front of them they stop. Then you walk a few steps and they start up again. You also can never see them. I think it's also interesting that you never hear bunnies. They just don't make sounds as they hop through the grass!