vertebrate animals

Characteristics of reptiles

Characteristics of amphibians

Characteristics of fish

Characteristics of birds

characteristics of mammals

They are oviparous, live both on land and in water, cold-blood, and their skin is covered with thick and hard scales.

They are oviparous, live in water, cold-blood, they have fins to move and gills to breathe and their skin are covered with scales.

Bird

They are oviparous, warm-blood, their skin are covered with feathers, use their beak for feeding.

Fish

Reptile

Amphibian

They are viviparous and have hair/fur, warm-blood, feed with milk and breathe through lungs.

Mammal

They are oviparous, cold-blood, they have skin that is moist and bare, live in water when they are babies and live on land when they are adults, breathe through gills when they live in water and with lungs when they live on land.