
Mammals
Warm-blooded animals with fur or hair that typically give birth to live young and nurse them with milk.
Photo by Tomas Tuma

Reptiles
Cold-blooded animals with scales that typically lay eggs on land.
Photo by David Clode on Unsplash

Amphibians
Cold-blooded animals with smooth, moist skin that typically live in water as larvae and on land as adults.
Photo by Stephanie LeBlanc on Unsplash