Editor’s note: There has been a follow-up to this story: Yellowstone euthanizes baby bison that tourists loaded into their car .

The original story is below:

Two foreign tourist visiting Yellowstone National Park tried to leave with a baby bison, actually putting the calf in their vehicle and trying to leave.

Another park visitor told EastIdahoNews.com that she saw the tourists, a father and a son, pull up to ta ranger station with the bison in their SUV.

“They were demanding to speak with a ranger,” said Karen Richardson. “They were seriously worried that the calf was freezing and dying.”

The father-son tourists received a ticket, perhaps a slap on the wrist for trying to steal the new United States national mammal.

It’s been quite a spring for bison-tourist interaction at the park, as seen in this video:

RELATED: 10 facts about America’s new national mammal