Some subspecies are rare and at least one has already become extinct: the Queen Charlotte Islands caribou of Canada. Historically, the range of the sedentary boreal woodland caribou covered more than half of Canada and into the northern states in the U.S. Woodland caribou have disappeared from most of their original southern range and were designated as threatened in 2002 by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC). Environment Canada reported in 2011 that there were approximately 34,000 boreal woodland caribou in 51 ranges remaining in Canada.(Environment Canada, 2011b). Siberian tundra reindeer herds are in decline, and "Rangifer tarandus" is considered to be vulnerable by the IUCN.