Reindeer

The reindeer (Rangifer tarandus), also known as the caribou in North America, is a deer from the Arctic and Subarctic, including both resident and migratory populations. While overall widespread and numerous, some of its subspecies are rare and one (or two, depending on taxonomy) have already gone extinct.
The reindeer varies considerably in colour and size, and both genders grow antlers, though these are larger in the males and there are a few populations where females lack them completely.
Hunting of wild reindeer and herding of semi-domesticated reindeer (for meat, hides, antlers, milk and transportation) are important to several Arctic and Subarctic people. Even far outside its range, the reindeer is well known due to the myth where Santa Claus's sleigh is pulled by flying reindeer.