This document categorizes animals as either vertebrates or invertebrates. Vertebrates include animals like lions, fish, snakes, crocodiles, tigers, turtles and kangaroos that have backbones. Invertebrates lack backbones and include animals such as butterflies, snails, spiders, starfish, octopuses, ants and jellyfish. The document then provides examples of vertebrate and invertebrate animals categorized by their major subgroup.