There are 38 subspecies of Canis lupus listed in the taxonomic authority Mammal Species of the World. These subspecies were named over the past 250 years, and since their naming, a number of them have gone extinct. The nominate subspecies is the Eurasian wolf.
The tundra wolf, also known as the Turukhan wolf, is a subspecies of grey wolf native to Eurasia's tundra and forest-tundra zones from Finland to the Kamchatka Peninsula. It was first described in 1792 by Robert Kerr, who described it as living around the Yenisei, and of having a highly valued pelt.
The northwestern wolf, also known as the Mackenzie Valley wolf, Alaskan timber wolf, or Canadian timber wolf, is a subspecies of gray wolf in western North America. Arguably the largest gray wolf subspecies in the world, it ranges from Alaska, the upper Mackenzie River Valley; southward throughout the western Canadian provinces, aside from prairie landscapes in its southern portions, as well as the Northwestern United States.
The steppe wolf, also known as the Caspian Sea wolf, is a subspecies of grey wolf native to the Caspian steppes, the steppe regions of the Caucasus, the lower Volga region, southern Kazakhstan north to the middle of the Emba, and the steppe regions of the lower European part of the former Soviet Union. It may also occur in northern Afghanistan and Iran, and possibly the steppe regions of far eastern Romania, Hungary and other areas of Eastern Europe. Studies have shown this wolf to be a host for rabies. Due to its close proximity to humans and domestic animals, the need for a reliable vaccine is high.
The Newfoundland wolf was a subspecies of grey wolf that was native to Newfoundland. As a food source, the species would prey and rely on the Newfoundland caribou. During the autumn and early winter, some wolves would turn white while others remained dark enough to look black.
The Kenai Peninsula wolf, also known as the Kenai Peninsula grey wolf, is an extinct subspecies of the gray wolf that lived on the Kenai Peninsula in southern Alaska.
Bernard's wolf, also known as the Banks Island wolf or the Banks Island tundra wolf, is an extinct subspecies of the gray wolf that was limited to Banks and Victoria Island of the Arctic Archipelago.
The Florida black wolf, also known as the Florida wolf and the black wolf, is an extinct subspecies of red wolf that was endemic to Florida.
Gregory's wolf, also known as the Mississippi Valley wolf, was a subspecies of the red wolf. It was declared extinct in 1980. It once roamed the regions in and around the lower Mississippi River basin.
The Manitoba wolf, also known as the grey-white wolf, is an extinct subspecies of gray wolf that roamed in the southern Northwest Territories, northern Alberta, Saskatchewan, and south-central Manitoba. This wolf is recognized as a subspecies of Canis lupus in the taxonomic authority Mammal Species of the World (2005).
The Hudson Bay wolf is a subspecies of gray wolf native to the northern Kivalliq Region, including the northwestern coast of Hudson Bay in Canada. It was first classed as a distinct subspecies in 1941 by Edward Goldman, who described it as being a white colored, medium-sized subspecies similar to C. l. arctos, but with a flatter skull. This wolf is recognized as a subspecies of Canis lupus in the taxonomic authority Mammal Species of the World (2005).
The Labrador wolf is a subspecies of gray wolf native to Labrador and northern Quebec. It has been described as ranging in color from dark grizzly-gray to almost white, and of being closely related to the Newfoundland wolf. This wolf is recognized as a subspecies of Canis lupus in the taxonomic authority Mammal Species of the World (2005).
The Mackenzie River wolf or Mackenzie Arctic Wolf is a subspecies of gray wolf which is found in Canada's southern portion of Northwest Territories. Not much has been published on Canis lupus mackenzii but one of the most comprehensive studies was done in 1954 by W.A. Fuller, Wolf Control Operations, Southern Mackenzie District, Canada Wildlife Service Report. This wolf is recognized as a subspecies of Canis lupus in the taxonomic authority Mammal Species of the World (2005).
The Baffin Island wolf, also known as the Baffin Island tundra wolf, is a subspecies of grey wolf which resides exclusively on Baffin Island and several nearby islands. It was not formally recognized as a subspecies until 1943, when it was given its taxonomic classification by Anderson. This wolf is recognized as a subspecies of Canis lupus in the taxonomic authority Mammal Species of the World (2005).
The Mogollon mountain wolf is an extinct subspecies of gray wolf whose range once included Arizona and New Mexico. It is darker than its more northern cousins, and has a highly arched frontal bone.
The Texas wolf is an extinct subspecies of gray wolf, distinct from the Texas red wolf, whose range once included southern and western Texas and northeastern Mexico.
The Alaskan tundra wolf, also known as the barren-ground wolf, is a North American subspecies of gray wolf native to the barren grounds of the Arctic coastal tundra region. It was named in 1912 by Gerrit Smith Miller Jr., who noted that it closely approaches the Great Plains wolf in skull and tooth morphology, though possessing a narrower rostrum and palate. It is a large, white-colored wolf closely resembling C. l. pambasileus, though lighter in color. This wolf is recognized as a subspecies of Canis lupus in the taxonomic authority Mammal Species of the World (2005).
The southern Rocky Mountain wolf is an extinct subspecies of gray wolf which was once distributed over southeastern Idaho, southwestern Wyoming, northeastern Nevada, Utah, western and central Colorado, northwestern Arizona, and northwestern New Mexico. It was a light-colored, medium-sized subspecies closely resembling the Great Plains wolf, though larger, with more blackish-buff hairs on the back. This wolf went extinct by 1935. Wolves of the subspecies Canis lupus occidentalis have now been reestablished in Idaho and Wyoming.
The Mongolian wolf is a subspecies of gray wolf which is native to Mongolia, northern and central China, Korea, and the Ussuri region of Russia.
The Austro-Hungarian wolf, also called the reed wolf, common reed wolf, grey reed wolf or Hungarian reed wolf, is a wolf or wolf-like animal that is thought to have once inhabited present-day Hungary and eastern present-day Austria. It is generally assumed to have gone extinct before 1900 or in the early 20th century.
