• Worldwide, the species is classified as vulnerable because of an estimated 40 percent reduction in numbers over 25 years — from 4.8 million to 2.89 million animals.
• There are 14 documented subspecies of which two are extinct.
• Reindeer are largely known as caribou in North America. Most U.S. populations (27 herds with roughly 660,000 animals) are in Alaska. There is also a remnant population of about a dozen boreal woodland caribou in the Selkirk Mountains of Idaho.
• In Europe, wild reindeer are found in the mountains and forests of Norway, Finland, and Russia.
• Female reindeer can as live as long as 12–16 years. Bulls live a few years less.
• Weights of adult bulls average 350-400 pounds. Mature females average 175–225 pounds.
• Reindeer are the only type of deer in which both the male and female reindeers grow antlers. Antlers fall off and regrow every year. A bull’s can grow up to 51 inches long and weigh up to 33 pounds.
• Reindeer may migrate over 3,000 kilometers in a year in search of sheltered climates and food.
Sources: Alaska.gov, International Union for Conservation of Nature