Reindeer are real animals. They are a type of large deer that lives close to the North Pole, specifically above the tree line in North America, Greenland, Eurasia and Siberia.
Reindeer share many characteristics with caribou, and the Smithsonian National Museum of Natural History suggests that they could be the same species. Reindeer are a hardy species that is well adapted to life in cold climates. They are slightly smaller than caribou and were domesticated about 2,000 years ago in northern Eurasia. This process of domestication continues as of 2014, because many people in the Arctic regions, such as the Sami in Scandinavia and the Chukchi people of northern Russia, use the animal for things such as food, shelter and clothing.