The deer is a hoofed mammal belonging to the family Cervidae. They are known for their long legs, slender bodies, and antlers, which are typically found on males. Deer are herbivores, primarily feeding on leaves, grass, and fruits. They are found in various habitats, including forests, grasslands, and wetlands, across many parts of the world. There are several species of deer, such as the white-tailed deer, red deer, and moose. Deer are social animals, often living in groups called herds. They are also known for their agility and speed, which help them evade predators like wolves and mountain lions.