Wolves are pack predators, but hunger can drive them on to attempt to tackle even the largest of prey alone. The video below was recorded last year in Yellowstone National Park and shows a gray wolf doggedly pursuing an elk. As a herd of nearby bison watch on, the elk carefully positions itself in the relative safety of the river. The wolf, however, is very determined.
The dramatic footage was taken by the Boone and Crockett Club‘s Tony Schoonen, who was among a crowd that gathered to watch the epic confrontation play out. Unfortunately, he was not able to record the final outcome of the chase.
Source: Outdoor Hub