Reindeer, also known as caribou in North America, are large herbivorous mammals belonging to the Cervidae family. They are well adapted to cold environments, with thick fur and a layer of fat that helps insulate them from harsh weather. Reindeer are known for their impressive antlers, which both males and females grow, making them unique among deer species. These animals are primarily found in the Arctic and subarctic regions, where they migrate in search of food. Reindeer are social creatures, often forming large herds. They primarily feed on grasses, lichens, and mosses, playing a crucial role in their ecosystem by helping to maintain the balance of plant life.