The northernmost subspecies of caribou, the Peary Caribou is found on the Queen Elizabeth Islands and Greenland. It is well adapted to life on the tundra. The hollow shafts of its coat-hair trap air, thereby insulating the caribou against even extreme cold. Both sexes typically develop a rack of upright, asymmetrical antlers, although the bulls' antlers are considerably larger and more complex than the cows'. Caribou are the only members of the deer family whose females typically develop antlers. Reindeer is the name usually used to designate the wild and semi-domesticated subspecies of caribou that is native in Europe.

This photograph was taken at Polar Bear Pass, Bathurst Island, Nunavut on July 26, 1973.