While we photographed the Great Gray Owl in Yellowstone Park, up trotted a Red Fox. These foxes are found from the Arctic Circle through most of North America, North Africa, and Eurasia. Their range has expended into suburban areas and they are introduced into Australia, where Red Foxes are considered to be invasive pests. They mainly take rodents, but also feed on rabbits, game birds, reptiles and invertebrates. Red Foxes are often found in pairs or in small family groups. Young remain with their parents and assist in caring for other young (Wikipedia). We, however, only saw this single fox.