Reindeer

The reindeer, called caribou in North America, is a species of deer adapted to Arctic and subarctic environments across northern Europe, Asia and North America, notable among deer for having antlers in both males and most females. It undertakes some of the longest overland migrations of any land mammal, with some North American caribou herds traveling well over a thousand kilometres a year between calving grounds and wintering areas, and its broad, concave hooves act like snowshoes, helping it move across snow and soft tundra. Reindeer feed on grasses and sedges in summer and rely heavily on lichen in winter, digging through snow to reach it. While reindeer have also been domesticated and herded by Arctic peoples for centuries, wild populations have declined in many regions due to habitat disruption, and the species overall is classified as vulnerable.