#1 covers a whole range of different possible functions, of course. Balance and navigation (birds, cats, etc) is still somewhat related to the original functio

#1 covers a whole range of different possible functions, of course. Balance and navigation (birds, cats, etc) is still somewhat related to the original function in fish. Sexual attraction/signalling Grabbing stuff A third leg in kangaroos Fly swatter (cows and other large grazers) For kids to hold onto their parent (elephants) I'm sure there's a lot of other creative applications of tails that I'm missing.