Reindeer, also known as caribou, are members of the deer family and have a relatively long lifespan. The average lifespan of a reindeer in the wild is around 10-12 years, although they can live longer in captivity with proper care and attention. Some domesticated reindeer have been known to live up to 20-25 years, which is quite remarkable for this majestic animal. Reindeer are important to the people of the Arctic and northern regions, who rely on them for transportation, food, and materials.