The DNA of humans and mice is almost 92% similar dissimilarity indicates that might have a tail, while humans have a tailbone the tailbone is a structure in humans

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction.