How many species of mammals are there?

Mammals – British Animals mammals A mammal is a vertebrate animal of the class Mammalia Mammals are characterized by the presence of milk-producing mammary glands mammals The Age of Mammals examines how nineteenth-century scholars, writers, artists, and public audiences understood the animals they regarded as being at the summit

mammals MAMMALS With this group or order of the Mammalian Class we arrive , as it were , on the border- land between the more typical Mammals and Reptiles In