Alberta’s largest and northern-most wildland park, Caribou Mountains contains provincially significant wetlands and sub-arctic habitat. The park includes about 80% of the range of an important population of woodland caribou, a threatened species in Alberta. A population of up to 120 wood bison (an endangered species) lives in the Wentzel Lake area in small groups of up to 15 animals. It's believed that bison introduced polar reed grass to the area. The Caribou Mountains provide habitat for species normally found much farther north including gray-cheeked thrush, red-necked phalarope, red-throated loon, American tree sparrow, mew gull, pacific loon and surf scoter. Wetlands are an integral part of the Caribou Mountains. The peat plateau bog and northern ribbed fens in the area are unique environments of provincial significance.