The ermines of Yellowstone are just one of the many reasons to visit this place in winter.
During warmer months, these short-tailed weasels only have white belly fur, and a brown coat with black tail tip. As the temperature drops, their coats lighten to a snowy white fur. Standing in the foreground, without the black tail tip, these ermines are difficult to spot. They blend in so well with the winter landscape that these foot-long creatures take a trained eye to find in the wild.
At Yellowstone, these stoats nimbly explore the frigid landscape as they hunt for smaller, or larger, prey.
Stock Image #20180312-163608