The pronghorn is the fastest North American mammal, capable of sprinting up to forty miles (60 km) per hour and maintaining speeds of thirty miles (45 km) per hour.
It lives in small scattered groups in the summer, but in winter herds of up to a hundred may converge, foraging for grasses, weeds, shrubs, and forbs.
When a pronghorn is alerted to danger, the white hairs on its rump will stand erect, signaling the others to flee.
Both male and female have horns but the male's are larger.
During breeding season, the male marks its territory with droppings and urine, and violently defends its harem against all rivals.
Ready for the next mammal? Check out the Przewalski's Horse.
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