Mammalia

class of animals, mostly terrestrial tetrapods, some aquatic Mammals (Mammalia) is a class of organisms united by key anatomical and physiological traits. It contains 29 orders with 2,850 known species. Key order groups include Afrosoricida, Even-toed Ungulates, Carnivorans, Whales & Dolphins, Bats, and Cingulata. Among its members, 706 species are currently classified as threatened (Critically Endangered, Endangered, or Vulnerable). Well-known representatives include African elephant, Bamboo bear, blue whale, and Buckelwal. It belongs to Chordates (Chordata).