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The wolf is the largest member of the canine family. Gray wolves range in color from grizzled gray or black to all-white. As the ancestor of the domestic dog, the gray wolf resembles German shepherds or malamutes. Wolves are making a comeback in the Great Lakes, northern Rockies and Southwestern United States   


Fast Facts

Height: 26-32 inches (.7-.8m) at the shoulder.
Length: 4.5-6.5 feet (1.4-2m) from nose to tip of tail.
Weight: 55-130 lbs (25-59 kg); Males are typically heavier and taller than the females.
Lifespan: 7-8 years in the wild, but some have lived 10 years or more.



Wolves eat ungulates, or large hoofed mammals, like elk, deer, moose and caribou. Wolves are also known to eat beaver, rabbits and other small prey. Wolves are also scavengers and often eat animals that have died due to other causes like starvation and disease.



There are an estimated 7,000 to 11,200 wolves in Alaska and more than 5,000 in the lower 48 states. Around the world there are an estimated 200,000 in 57 countries, compared to up to 2 million in earlier times.



Wolves were once common throughout all of North America but were killed in most areas of the United States by the mid 1930s. Today their range has been reduced to Canada and the following portions of the United States: Alaska, Idaho, Michigan, Minnesota, Montana, Wisconsin and Wyoming. Mexican wolves are found in New Mexico and Arizona.Thanks to the reintroduction of wolves in 1995, Yellowstone National Park is one of the most favored places to see and hear wolves in the native habitat. 



Wolves live, travel and hunt in packs of 4-7 animals on average. Packs include the mother and father wolves, called the alphas, their pups and several other subordinate or young animals. The alpha female and male are the pack leaders that track and hunt prey, choose den sites and establish the pack's territory. Wolves develop close relationships and strong social bonds. They often demonstratedeep affection for their family and may even sacrifice themselves to protect the family unit.


Did You Know?

Wolves can range in color, from pure white in Arctic populations, to brown, gray, cinnamon and black.

Wolves have a complex communication system ranging from barks and whines to growls and howls. While they don't howl at the moon, they do howl more when it's lighter at night, which occurs more often when the moon is full.



Mating Season: January or February.
Gestation: 63 days.
Litter size: 4-7 pups.

Breeding season occurs once a year late January through March. Pups are born blind and defenseless. The pack cares for the pups until they fully mature at about 10 months of age when they can hunt on their own. Once grown, young wolves may disperse. Dispersing wolves have been known to travel 50 to 500 miles.



The most common cause of death for wolves is conflict with people over livestock losses. While wolf predation on livestock is fairly uncommon, wolves that do prey on them are often killed to protect the livestock. Defenders is working with livestock owners to develop non-lethal methods to reduce the chances of a wolf attacking livestock. These methods include fencing livestock, lighting, alarm systems and removing dead or dying livestock that may attract carnivores like wolves.

Defenders' Proactive Wolf Efforts


Another serious threat is human encroachment into wolf territory, which leads to habitat loss for wolves and their prey species.

Overall, the greatest threat to wolves is people's fear and misunderstanding about the species. Many fairy tales and myths tend to misrepresent wolves as villainous, dangerous creatures.

Reasons For Hope


Defenders and many other conservation organizations have been working tirelessly on wolf conservation in North America from aerial hunting in Alaska to restoration efforts in the lower 48 States. Wolves are an integral part of an ecosystem as a top tier predator and Defenders will continue to make sure this iconic symbol of America always has a place here.

(information source: Defenders of Wildlife)

Legal Status/Protection


  • Endangered Species Act (ESA): wolves throughout the Lower 48 United States are listed as endangered except in Minnesota where they are listed as threatened. In Alaska, wolves are not listed under the ESA. 
  • In Wyoming and portions of the Southwest wolves are designated as non-essential experimental populations, which isolates geographically-described groups from other existing populations and offers broader management regulations.

Historic Victory


Historic Victory for Northern Rockies Wolves!

On August 5, 2010, a federal judge overturned a decision by the U.S. Fish and Wildlife Service (FWS) to remove gray wolves from the Endangered Species Act (ESA), restoring their endangered status and paving the way for these critical predators to rebuild their numbers to ecologically sustainable levels. This ruling is the result of a lawsuit brought against the FWS in 2009 by Defenders of Wildlife and other conservation organizations.

Check out this great video on 

How Wolves Change Rivers...

Before & After Wolves