Bison Bull and Cow - Courting Pair
A bull bison groans a warning to the other bulls that this cow is taken. The bulls will pair up with a cow and will protect her at all costs until she is ready to breed. Until that time, they are attached at the hip; when she moves, he moves. Captured in Yellowstone National Park's Hayden Valley.
The American bison is a North American species of bison that once roamed the grasslands of North America in massive herds. Their range once roughly comprised a triangle between the Great Bear Lake in Canada's far northwest, south to the Mexican states of Durango and Nuevo León, and east along the western boundary of the Appalachian Mountains.