To be classified as mammal an animal must be warm-blooded and nourish its young with milk A human being of course is considered a mamal since humans are both warm-blooded and can nurse their young Surprisingly another mamal is a whale though whales live in the sea they are warm-blooded and need to come up for
air regularly during the day finally though a bat files it also considered a mamal the forelimbs of
bat have been modified in this warm-blooded animal to from wings