Gray wolves are highly versatile animals and thrive in a wide range of environments, including woodlands, tundra and desert regions. The gray wolf's current habitat includes Canada, Alaska, the Great Lakes, the northern Rockies and the Pacific Northwest.
Gray wolves once lived throughout all of North America, but their populations were eradicated by humans in most areas of the United States by the 1930s. Due to a reintroduction program in 1995, Yellowstone National Park is now one of the most popular locations to observe gray wolves in their natural habitat. In order to thrive, wolves require large areas of wild habitat, with adequate access to food, places of shelter and protection from being hunted or killed.