"He should be ashamed of himself." Video of tourist breaking rules at National Park sparks outrage: 'It's so aggravating' ...

Wildlife recently passed a major milestone as it's been 30 years since wolves were reintroduced in Yellowstone National Park.

Wildlife recently passed a major milestone as it's been 30 years since wolves were reintroduced in Yellowstone National Park.

Colorado officials captured 15 wolves from British Columbia and released them onto the Western Slope on Jan. 12, 14, and 16.

Wildlife recently passed a major milestone as it's been 30 years since wolves were reintroduced in Yellowstone National Park.

During a big week for Yellowstone wildlife, Missoulians gathered at Xplorer Maps to learn more about two of the park’s key ...

By Shannon Lukens. Photos courtesy Colorado Parks and Wildlife. Caption: A Gray Wolf stands outside of its crate for a brief ...

The wolves were darted and immobilized in Oregon by expert marksmen and biologists working from a helicopter. They were ...

Investigating possible grizzly, wolf and lion kills can be a messy business. But there are vital clues in bloody, dismembered ...

Photographer Drew Simms braved extreme winter conditions in Yellowstone National Park to document its wildlife enduring a freezing temperatures as low as -37°F (-38.3°C). Over a week-long expedition, ...

The lawsuit, filed by the Alliance for the Wild Rockies and Council on Fish & Wildlife, comes less than three weeks after the state of Montana also sued the park.

The lawsuit, filed by the Alliance for the Wild Rockies and Council on Fish & Wildlife, comes less than three weeks after the ...