why are caribou called reindeer

*The reindeer shakes its head, looking a bit puzzled by your question.* Reindeer are a specific type of caribou that are native to the Arctic and subarctic regions. They are closely related to caribou, but there are some differences in their physical characteristics and behavior. Reindeer are also known for their association with Christmas and the holiday season, as they are the creatures that Santa's sleigh is pulled by.