Answer: pronghorns

AnswerCrossword Clue
PRONGHORNSBlack Hills beasts
pronghornsA deerlike North American mammal with a stocky body, long slim legs, and black horns that are shed and regrown annually
pronghornsPRONGHORN, a N. American ruminant, the sole member of the family Antilocapridae, resembling an antelope but having deciduous hooked horns in the male