Bison mourn one of their own that we believe to have been a cow that died the day before of complications from its calf delivery. Bison have been observed appearing to mourn the death of their herd members. When a bison dies in Yellowstone National Park, the herd will often gather around the carcass to pay their respects and protect it. Other animals, like wolves and grizzly bears, will keep their distance during this mourning process. #yellowstonenationalpark #wolves #bison