Mammals are animals that give birth to their babies and feed them milk (e.g. dogs, horses).
Amphibians are creatures that can live both on land and in the water (e.g. frogs).
Insects are small animals with six legs. Most, but not all. have wings, too (e.g. bees).
Fish are creatures that live in the water and have fins and a tail (e.g. salmon, sharks).
Birds have feathers and wings and they lay eggs Most can fly (e.g. eagles, swans).
Reptile are cold-blooded creatures with scales and they lay eggs (e.g. crocodiles, snakes).
> Otters are mammals.