Yellowstone tourists put bison calf in car, spurring warning

(AP) — A bison calf that tourists loaded into their vehicle at Yellowstone National Park because they were concerned for its welfare could not be reunited with its herd and had to be euthanized, park officials said Monday as they reasserted the importance of avoiding wildlife.

The incident last week and several other recent cases led to fresh warnings that park rules require visitors to stay at least 25 yards from all wildlife and 100 yards from bears and wolves.

"The bison calf was later euthanized because it was abandoned and causing a dangerous situation by continually approaching people and cars along the roadway," the park said in a statement.