Coyote, <em>Canis latrans</em>, Predation on a Bison, <em>Bison bison</em>, Calf in Yellowstone National Park

We observed a single adult male Coyote ( Canis latrans ) kill a Bison ( Bison bison ) calf in Yellowstone National Park. The predation is, to our knowledge, the only direct and complete observation of a lone Coyote capturing and killing a Bison calf. The bison calf had unsuccessfully attempted to ford a river with a group and subsequently become stranded alone in the territory of a six-year-old alpha male Coyote.