Caribou and reindeer are actually the same species-Rangifer tarandus-but there are some minor differences between the two. Caribou are native to North America, whereas reindeer are native to northern Europe and Asia. Some people also use the term “reindeer” to refer to domesticated work animals in North America. Caribou, on the other hand, are wild-living and long-migrating. Caribou are also taller and lankier than reindeer.