Add Yahoo as a preferred source to see more of our stories on Google. A majestic American bison stands on a rocky hill at sunrise, its breath steaming in the cold air as it looks toward the camera.© A ...

COMMERCE CITY, Colo — Rocky Mountain Arsenal National Wildlife Refuge (RMA) has welcomed its newest animal resident. The first bison calf of the spring season has been born at the Commerce City ...

A growing herd of 250 bison, re-introduced at the Rocky Mountain Arsenal National Wildlife Refuge to help restore toxic wasteland to the native short-grass prairie, often descends through a floodplain ...

Getting your Trinity Audio player ready... Wild bison grazing on sunflower-studded prairie at Rocky Mountain Arsenal National Wildlife Refuge are in business — as greeters of millions of travelers.