A reindeer is a large deer-like animal that lives in the Arctic and is known for pulling Santa's sleigh on Christmas Eve. Reindeer have antlers that can grow up to 5 feet long and are used to help them navigate through the snow. They also have thick coats that help them survive in the cold Arctic climate. Reindeer can run at speeds up to 50 miles per hour and can jump up to 15 feet high. They are also known for their ability to travel long distances without rest or food.