Watch—and listen to—two satisfying minutes of a fox on the prowl in Yellowstone National Park. | National Geographic

Red fox (Vulpes vulpes) are highly vocal, and we hear them year-round, especially during the winter breeding season (January–March in New England) when cold nights amplify their calls (sound travels farther, and slightly slower, in the cold). The second clip was taken during the peak of breeding season last winter. These sounds often startle unsuspecting folks, and are commonly mistaken for fisher (that are not very vocal at all), domestic animals, or even human screaming. They produce over 20 d