convention before the recent revision (see below). Reindeer / caribou (Rangifer) vary in size from the smallest, the Svalbard reindeer (R. (t.) platyrhynchus), to the largest, Osborn's caribou (R. t. osborni). They also vary in coat color and antler architecture.

The North American range of caribou extends from Alaska through the Yukon, the Northwest Territories and Nunavut throughout