![Caribou from Wagon Trails](http://upload.wikimedia.org/wikipedia/commons/thumb/4/44/Wapiti_from_Wagon_Trails.jpg/300px-Wapiti_from_Wagon_Trails.jpg)
The reindeer, (Rangifer tarandus) known as caribou in North America, is an Arctic and Subarctic-dwelling deer. In the wild, caribou migrate in large herds between their birthing habitat and their winter habitat. Their wide hooves help the animal move through snow and tundra; they also help propel the animal when it swims.