‘Ball of fluff’: rare white bison born in Wyoming is first in park’s 32-year history

One of Bear River state park's white heifers gave birth to a snowy calf, which is healthy and runs in circles called zoomies'

Staffers at the Bear River state park in south-west Wyoming welcomed four brown bison calves this spring and thought the birthing season was finished.

But earlier this month, as staff visited the animals' pasture, they saw a little white ball of fluff", park superintendent Tyfani Sager said.