Gray Wolf
Canis lupus

Threats

Hunting, poisoning, persecution, loss of habitat

STATUS:
ESA -- ENDANGERED

SIZE:
Weight:
45-176 pounds (20-80 kg)
Length:
40-63 inches (102-160 cm)

HABITAT:
In North America, forest, mountain, and tundra

POPULATION:
In lower 48 states of the United States: 2,500 In Alaska: 6,000-7,000 In Canada: 30,000

CURRENT RANGE:
Parts of northern North America and Eurasia (map shows N. American range only); becoming more common in Lake Superior states and northern Rockies

CONSERVATION:
reintroduction plans in Yellowstone, Idaho, and Montana; IUCN specialist groups recommend reintroduction programs for parts of Europe; CITES trade restrictions

  • The gray wolf had the greatest natural range of any living terrestrial mammal other than humans.

  • The gray wolf has recently been downlisted to "lower risk" by the IUCN.

  • Wolves inevitably prefer wild game to livestock. In North America, bison, deer, elk, moose, and beaver head the wolf's menu. This underlines the importance of reintroducing natural prey in areas where wolves are being restored.

  • In accounts from the last two centuries, wolves were often begrudgingly admired by their human executioners. Many stories portray them avoiding traps, refusing bait, and dodging bullets. Wolves can make themselves vomit at the first sign of nausea or irritation. Until the development of strychnine, they were considered almost impossible to poison.

  • Wolf-pack size varies with the size of prey. Packs that feed primarily on deer, for example, will usually number seven or fewer. Packs that feed on larger game, such as moose, may consist of 15 to 20 animals.

  • Wolves once inhabited all of New York State. Not until the arrival of the colonial settlers in the early 1600s did conflicts begin. As farms were settled, competition with the wolf was fierce. The last wild wolf in New York was killed in the Adirondacks in 1897.
  • Branded
    Insatiable killer. That's the reputation that the gray wolf (also known as the timber wolf) acquired in western North America in the 19th and early 20th centuries. The wolf, which in the New World once roamed from northern Canada to Mexico, was branded a pariah, a bloodthirsty menace to settlers and their livestock, a kill-or-be-killed monster. These labels were undeserved, but the actions they inspired were profoundly effective. In the last half of the 19th century, an estimated 2 million wolves were shot, trapped or poisoned in the lower 48 states. Today they occupy about 1 percent of their former range. About 2,000 wolves remain in Minnesota; everywhere else they are either extinct or reduced to populations of a few dozen animals.

    So now we are left with the question: why was the wolf, among the many predators of North America, singled out for extermination? As the West was settled, vast areas of natural habitat were converted to farm and ranch land. Populations of bison, deer, elk, and moose -- the natural prey of wolves -- were scattered and drastically reduced. The wolves reacted by turning to sheep and cattle, and the farmers, ranchers, and local officials, in turn, reacted by instituting wolf bounties. It was, of course, no contest. By 1930, wolves had been extirpated in all but the most isolated parts of the U.S.

    Wolf Redux
    Four decades later, attitudes toward the gray wolf (and toward our disappearing flora and fauna in general) had changed. In 1974 the wolf was placed under the protection of the Endangered Species Act. By the 1980s, plans were under way to return it to selected portions of its former range. The most visible and controversial of these sites is Yellowstone National Park. Since Yellowstone was established as a refuge in 1872, the gray wolf is the only vertebrate that has disappeared from the park. In 1994, the U.S. Fish and Wildlife Service introduced Canadian wolves into Yellow-stone, and parts of Idaho and Montana. In May 1995, a reintroduced female wolf gave birth to eight pups in Yellowstone -- the first gray wolf birth in the park in 70 years. The current plan calls for releases to continue for three to five years. It's hoped that the wolf can be removed from the Endangered Species List by early in the next century.

    Wolf Wars
    Not everyone has welcomed the wolf's return. Ranchers in some areas are concerned for their livestock. To help alleviate these concerns, reintroduced wolves found outside Yellow-stone's boundaries are classified as "nonessential" or "experimental." This is an Environmental Protection Agency designation that permits local authorities to control the wolves if they become a threat to livestock or prey species. Defenders of Wildlife, a private organization, compensates landowners for any loss of stock that can be attributed to wolves. To date, only a few dozen claims have been made -- an indication that free-ranging wolves represent a minimum danger. Still, there are strong feelings on both sides of the reintroduction issue; how it plays out over the coming decades will be a clear gauge of public attitudes toward such programs.

  • The extinct Japanese subspecies (Canis lupus hodophilax) was the smallest modern wolf.
  • © 1996 The American Museum of Natural History. All Rights Reserved.