Yellowstone visitor's rescue attempt leads to euthanization of baby bison.

A newborn bison calf at Yellowstone National Park had to be euthanized after a tourist tried to help it cross a river, causing it to be rejected by its herd. Park rangers were unable to reunite the calf with its mother, and it was causing a hazardous situation by approaching cars and people along the roadway. The Park Service reminded visitors to stay at least 25 yards away from all wildlife and that approaching wild animals can drastically affect their well-being and survival. Law enforcement officials are seeking information about the incident, and the man who disturbed the calf could potentially face a misdemeanor charge carrying a sentence of up to six months in jail and a $5,000 fine.