Bison Swift Kick
When mother Bison (Bison bison) isn't in the mood to nurse her month-old calf (there are called "red dogs" or "cinnamons" at this stage), she teaches the calf to leave her alone. When the calf doesn't heed her, she delivers a swift but harmless kick to the calf's head, Bison-style. Custer State Park, Black Hills, South Dakota.