A tour group watched a pack of wolves unsuccessfully try to take down a bison in Yellowstone National Park this past weekend.

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A tense scene unfolded in Yellowstone National Park when a group of gray wolves from the Junction Butte pack attempted to hunt a young bison calf, only to be thwarted by the sheer power and teamwork ...

A prominent wolf that lived among Yellowstone's most famous wolf pack is believed to have been illegally shot and killed just outside the park last month, according to wildlife experts. NOTE: The ...