Wolves in Yellowstone prey on bison calves – along with elk, deer and other mammals – and have been known to attack adult bison if an animal appears vulnerable.

Although Yellowstone’s wolf packs do predate bison, this attack was rare. Bison make up 5% of wolves’ diet, the bulk of which is elk. A large crowd was enthralled.

Members of the Mollie's pack surround a bison in this February 2005 photograph. The wolves try to harass the bison into deeper snow, where the bison are less of a threat and easier to attack.

Guests on a Yellowstone National Park nature tour Saturday witnessed a dramatic predation attempt by wolves on a bison calf that escaped thanks to its larger herd mates. The accompanying footage ...

Yellowstone's Junction Butte wolf pack failed in a recent attempt to kill a bison, but the pack appears to be thriving again after the death of its former alpha female, Wolf 907F.

Bison Charge Into Crowd At Yellowstone There is a ... they were really hyped up because of the wolf attack." Honestly, the entire situation is a little crazy but completely understandable.

Overall, bison are a small part of the Yellowstone wolves' diet, and wolf kills make no dent in the bison population. Out of 323 wolf kills documented by the park's staff in 2007, only 11 (3.4 ...

Bison attacked two more visitors at Yellowstone National Park over the past week, for a total of four attacks in the park so far this season. A 68-year-old Georgia woman remained hospitalized ...

Opinion: Wolves need federal protection to survive Park officials did not release the woman’s name or condition. How far the two people were from the bison when the attack began was unknown, the ...

Bison attacked two more visitors at Yellowstone National Park over the past week, for a total of four attacks in the park so far this season. A 68-year-old Georgia woman remained hospitalized ...