The Black Hills, South Dakota/Wyoming - Marc Haegeman Photography

Bison in Custer State Park

Unlike your regular cow, bison can be deadly dangerous, especially in the rut when testosteron-packed bulls think of one thing only. This big male charged heedlessly past the car, seconds after this picture was taken.

animalswildlifebisonbuffaloCuster State ParkBlack HillsSouth DakotaUSA