Photos of a white bison calf in Yellowstone National Park have generated excitement as well as questions: How does that happen?
A park visitor said she took the photographs in the park earlier this month, showing a fuzzy white youngster being nuzzled by its dark brown mother. Park officials said this week that they hadn’t yet spotted a white calf in the sprawling park in Wyoming and Montana, home to about 5,000 bison, also called American buffalo.
