Add Yahoo as a preferred source to see more of our stories on Google. After they were captured in Canada, the wolves released in Yellowstone National Park initially stayed in acclimation pens, like ...

This story was originally published by Mountain Journal. Around Crystal Creek, where the road bridges the Lamar River at the fringe of Yellowstone National Park’s Lamar Valley, a grove of aspens has ...

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 ...