Mammals
Definition of Mammals Hierarchical Category as it relates to Animals, Amphibians, Sea Animals
A class of warm-blooded vertebrates characterized by fur or hair, the secretion of milk by females for the nourishment of the young, and (typically) the birth of live young. This class includes a wide range of species, from terrestrial to aquatic and semi-aquatic animals, such as whales and seals, as well as those amphibious in nature. It is a subgroup within the broader and more inclusive category of animals.