A dolphin is a kind of mammal. ✬

A dolphin is a mammal. ✬

A whale is a mammal. ✬

A bat is not a bird, but a mammal. ✬

Easter bunnies are an oviparous species in the mammal family of Leporidae. ✬

It's a mammal. ✬

The whale is a mammal. ✬

The platypus, a small amphibious Australian mammal, is a very shy animal. ✬

The whale is a very large mammal that lives in the sea. ✬