The reindeer (Rangifer tarandus), also known as the caribou in North America, is a species of deer native to Arctic and Subarctic regions. This includes both resident and migratory populations. While overall widespread and numerous, some of its subspecies are rare and at least one has already gone extinct. Reindeer vary considerably in color and size. Both sexes grow antlers, though they are typically larger in males. However, there are a few populations in which females lack antlers completely.
Contributions by Deirdre, Big iron, and Rogper.