Yellowstone National Park staff had to euthanize a newborn bison calf after a park visitor tried to help the struggling animal near a riverbank but caused the herd to reject it, officials said.
After being abandoned, the calf had to be put down because it posed a danger by approaching cars and people on the roadways, the National Park Service said in a statement Tuesday.
"Approaching wild animals can drastically affect their well-being and, in this case, their survival," the Park Service said.
