Basically, everything after the cloaca is the tail. If you look at a snake skeleton, you'll can clearly see the tail is the part at the end without ribs. Snak

Basically, everything after the cloaca is the tail. If you look at a snake skeleton, you'll can clearly see the tail is the part at the end without ribs. Snakes evolved from lizards, and pythons still show vestiges of a pelvis and rear legs.