The document describes the key characteristics of different animal groups including reptiles, mammals, birds, insects, amphibians and fish. It lists traits such as how they reproduce (oviparous or viviparous), physical attributes (feathers, scales, hair, tails), locomotion abilities (wings, legs), and habitats (air, land, water). The table provides a high-level overview of distinguishing characteristics to compare these major animal classifications.

1. ANIMALS
Reptiles Mammals Birds
­ bones ­ beak
­ tail
­ hair ­ feathers
­ scales
­ viviparous ­ oviparous
­ oviparous
­ ears ­ wings
­ bones
­ 4 legs ­ 2 legs
­ 4 legs
­ breath air
Insects Amphibians Fish
­ oviparous ­ Oviparous ­ oviparous
­ no bones ­ swim and walk ­ swim
­ 6 legs ­ bones (live in the
­ some fly, ­ 4 legs water)
some don´t fly ­ scales
­ bones