Diverse and numerous -- Features of a reptile -- When reptiles ruled -- Skin, scales, and claws -- Reptilian senses -- Colours and camouflage -- On the hunt -- Eggs and young -- Turtles and tortoises -- Lizards galore -- Slithering snakes -- Crocs and gators -- Worm-lizards -- Reptiles of dry lands -- Forest reptiles -- River and swamp reptiles -- Reptiles at sea -- Reptiles in danger -- The animal kingdom.