Video shows elk charging photo-taking tourist at Yellowstone

A woman looking to take a picture of an elk during a visit to Yellowstone National Park got a lot closer than she expected when it charged at her.

Video posted on Facebook by tour guide Jody Tibbitts captures audio of him trying to warn the woman to back away before the elk rushes at her. The elk ended up stopping short and backing away.

A National Park Service spokesman tells ABC News those looking to get close-up photos of animals can endanger themselves and wildlife.

The park service says visitors should stay at least 100 yards from bears and wolves and at least 25 yards from all other wildlife.