Nothwestern Wolf (Canis lupus occidentalis)

By Ellie Attebery – Standing Wolf, CC BY 2.0,

Northwestern Wolf (Canis lupus occidentalis) – (Richardson 1829)

Common Names: Mackenzie Valley wolf, Alaskan timber wolf, Canadian timber wolf, or northern timber wolf,

Overall population:

Physical description: Weight -105 lb (48 kg) and 135 lb (61 kg)

Original range – Northwestern Canada and United States
Current range – Alaska, Unimak Island of the Aleutians, Mackenzie River Valley; British Columbia, Alberta, and Saskatchewan, Northwestern United States and reintroduced into Yellowstone National Park (YNP) and central Idaho in 1995-6

Habitat / Ecology / Prey:
Habitat – forest, mountains, wetlands
Preymoose (Alces alces), bison (Bison bison), elk (Cervus canadensis), caribou (Rangifer tarandus), mule deer (Odocoileus hemionus), Dall sheep (Ovis dalli), Sitka Black-tailed deer (Odocoileus hemionus sitkensis), mountain goats (Oreamnos americanus), beaver (Castor canadensis), salmon, vole, lemmings, ground squirrels, snowshoe hare (Lepus americanus)

Unique behaviors:

Legal and Cultural Background:

Alaska Wildlife Alliance (Alaska)
Wolf Song of Alaska  (Alaska)
Cascadia Wildlands (Eugene, Oregon; Cordova, Alaska)
Wolves – Environment Alaska
Raincoast Conservation Foundation
Pacific Wild (Denny Island BC, Canada)
Alberta Wilderness Association
Alberta Wilderness Association
Conservation Northwest (Bellingham, Seattle, Washington)
Pacific Wolf Coalition (Washington, Oregon, California)
Gifford Pinchot Task Force (Vancouver, WA)
Washington Chapter Sierra Club (Washington State)
Pacific Wolf Coalition (Washington State, Oregon, California)
Cascadia Wildlands (Eugene, Oregon; Cordova, Alaska)
Predator Defense (Eugene, Oregon)

Taxonomic/Genetic Information:


Further Reading

International Wolf Center- Alaska


Journal Articles / Scientific Publications:
Acute granulocytic anaplasmosis in a captive timber wolf (Canis lupus occidentalis); M Leschnik, G Kirtz, Z Virányi, W Wille-Piazzai… – Journal of Zoo and …, 2012 – BioOne

Notes on breeding Timber wolves Canis lupus occidentalis at Dresden Zoo;W GENSCH – International Zoo Yearbook, 1968 – Wiley Online Library

The timber wolf in the Rocky Mountain national parks of Canada. Cowan IM. Canadian Journal of Research. 1947 Oct

The names of the large wolves of northern and western North America; GS Miller – 1912 –