Reindeer are the only species of deer in which both the females and males grow antlers. Female reindeer can grow antlers that are 20 inches long, and males can grow a 51 inch long rack of antlers. Antlers are shed and re-grown each year.
Male reindeer shed their antlers each fall and females shed theirs in the spring. Caribou and reindeer are the same species of deer. Reindeer were domesticated from caribou in Northern Eurasia several thousands of years ago. Reindeer are slightly smaller than caribou. Reindeer are raised by many Arctic people in Europe and Asia. They are adapted to living in the extreme cold. They can survive on Arctic lichens and have a unique hair structure that provides excellent insulation against the cold.