Groups of vertebrates

• reptiles
• amphibians
• fish
• birds
• mammals

Group	Examples		Key features
Reptiles	Crocodile Lizard Snake		Cold-blooded Have lungs Dry scaly skin Lay leathery-shelled eggs
Amphibians	Frog Newt Salamander		Cold-blooded Adults have lungs, larvae have gills Moist skin Lay jelly-coated eggs in water
Fish	Goldfish Shark Cod		Cold-blooded Have gills Wet scales Lay eggs in water
Birds	Budgerigar Sparrow Ostrich		Warm-blooded Have lungs Feathers on body Lay eggs with hard shells Have wings
Mammals	Rabbit Kangaroo Human Dolphin		Warm-blooded Have lungs Have body hair or fur Give birth to live young Produce milk