Reindeer are large, herbivorous mammals that belong to the deer family. They are well adapted to cold environments, with thick fur and a layer of fat to insulate them from harsh weather. Both male and female reindeer grow antlers, which they shed and regrow annually. These animals are native to the Arctic and subarctic regions, often found in tundra and taiga ecosystems. Reindeer are known for their migratory behavior, traveling long distances in search of food. They primarily feed on grasses, mosses, and lichens, making them essential to the ecosystem in their habitats.