Thirty years ago, park rangers reintroduced grey wolves into Yellowstone National Park. They wanted to restore the ecosystem ...

Wolves are among Yellowstone's most popular sights – so popular and so closely watched they can become accustomed to seeing ...

Thirty years ago, park rangers reintroduced grey wolves into Yellowstone National Park. They wanted to restore the ecosystem and get the elk population, which had decimated the plant community, in ...

On four separate occasions, Wolf 907F seized power as the alpha female leader of the Junction Butte Pack in Yellowstone National Park. (National Park Service file photo courtesy of Jeremy ...

Yellowstone National Park’s wolves have been contentious ever since they were reintroduced in 1995. Within the park, the ...

After they were captured in Canada, the wolves released in Yellowstone National Park initially stayed in acclimation pens, like this wolf pictured in the Crystal Creek pen on Jan. 26, 1996. (Photo ...

The reintroduction of wolves to Yellowstone National Park in the 1990s had a cascading effect that benefited the entire ecosystem, a new study finds. The finding shows how the return or loss of apex ...

YELLOWSTONE NATIONAL PARK – Snow crunched underfoot as Mark Hebblewhite scanned the ridgelines of Canada’s Banff National Park. It was 1995, and the young biologist, fresh out of undergrad, was ...

This winter saw the most wolves from Yellowstone National Park killed in about a century. That's because states neighboring the park changed hunting rules in an effort to reduce the animals' numbers.

On January 11, 1995, approximately 17,000 elk bedded down in Yellowstone National Park. When they woke up a few hours later, a new scent was in the icy air: wolves. It had been 69 years since the last ...

YELLOWSTONE NATIONAL PARK, WYO. (Idaho Capital Sun) – Sitting in an old-growth spruce fir forest, Doug Smith says he can see first-hand the impact of reintroducing wolves on the larger ecosystem of ...