Mammal

Mammals are a group of vertebrate animals that are part of the class Mammalia. They are primarily classified by there presence of hair or fur, mammarly glands in females to produce milk to nurse their young, a neocortex, and three middle ear bones. There are currently around 6,400 living species of mammals that have been described. Rodents, bats, and euliopotyphla (consisting of hedgehogs, shrews, moles, etc.) are the largest orders in the class.