A third bison attacked in Yellowstone National Park (Photo: AP/Rob Goodell)

A 71-year-old woman was attacked by bison in Yellowstone National Park on Wednesday.

This is the second time bison have attacked a Yellowstone visitor in as few days, according to park officials.

A West Chester, Pennsylvania woman suffered a life-threatening injury in a crash that occurred as she and her daughter were returning to their car at the trailhead.

The two women inadvertently approached the animal while walking outside, causing the male bison to run in their direction.

The woman was taken by ambulance to West Park Hospital in Cody, Wyoming.

Authorities say the case is under investigation.

This year, the reported bison attack in the park was the third and the second in a week.

A 34-year-old Colorado man was attacked by a bison Monday while walking on a trail near a giant geyser with his family.

The giant creature first started running around with the whole family, and when they wouldn’t leave the area, it attacked a man who was taken to hospital after injuring his arm.

On May 30, another Yellowstone visitor had an unfortunate encounter with a Bull Bison.

A 25-year-old woman from Ohio was thrown 10 feet into the air by an angry bison in a park. She suffered puncture wounds and “other injuries” after coming within 10 feet of Bison, according to park officials.

Bison was walking near a trail near Black Sand Basin, just north of Old Faithful, when the woman approached him.

Park staff continue to advise visitors to stay away from the animals. In a statement, they explained that bison were unpredictable and injured more people in Yellowstone than any other animal.

He can also run three times faster than humans. It is important that this is always at a minimum distance of 25 meters.

The third attack will come about two weeks after the partial reopening of Yellowstone National Park, after the gates were flung open for the first time in decades due to catastrophic flooding.

The five entrances to the park, which covers parts of Wyoming, Montana and Idaho, were closed for weeks due to historic flooding that destroyed bridges and roads in the park.

Park Services announced June 18 that visitors will be able to enter the park’s South Loop, but congestion will be significantly less than the number of regular tourists who visit during the summer.

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