White-tailed buck White-tailed bucks are very shy animals. When they get scared, they wave their tails back and forth. White-tailed bucks are very shy animals. When they get scared, they wave their tails back and forth. If there is indeed a predator nearby, the deer stretch their tails upwards. The white fur that gives them their name becomes clearly visible. The biggest enemies of the white-tailed deer are wolves, coyotes, pumas, bears, alligators and jaguars. Fun fact The antlers of an adult white-tailed buck grow by about 60 mm every day.