mamiféra
Mammals are a class of vertebrate animals characterized by the presence of mammary glands, which in females produce milk for nourishing their offspring. This class includes over 6,000 living species, ranging from tiny shrews and bats to large whales and elephants. Mammals are endothermic, meaning they generate their own body heat, and are distinguished by their hair or fur, which helps regulate body temperature. They also possess a neocortex, a region of the brain associated with higher cognitive functions.
Mammals are further divided into two main groups: monotremes and therians. Monotremes, such as platypuses and
Mammals exhibit a wide range of adaptations, from the flight of bats to the swimming of whales.