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Pronghorn

Antilocapra americana

Conservation status IUCN: Least concern· LC
Pronghorn (Antilocapra americana)
Photograph from Wikimedia Commons · Wikipedia article (it)

Where the name comes from

Antilocapra is a name that admits its own confusion: it joins antelope and the Latin capra, goat, because the naturalists did not know where to put it. The doubt was right — it is neither, and it is the only surviving species of an entire American family. The English pronghorn describes instead the one certain thing: the branched horns.

Facts

Group
Mammals · Mammalia
Order
Even-toed ungulates
Habitat
Prairie, sagebrush, open semi-desert
Range
Western North America, from southern Canada to northern Mexico
Size
130–150 cm long, 35–65 kg
Diet
Herbivore — sagebrush, shrubs, grasses, plants toxic to other grazers
Lifespan
10–15 years

Characteristics

  • 01

    It runs at 88 km/h and is the fastest mammal over distance: it holds 60 km/h for kilometres.

  • 02

    It has branched hollow horns whose sheath drops and regrows every year, a case unique in the world.

  • 03

    It jumps poorly and does not clear fences: it goes under, and low wires block it on migration.

What sets it apart

It runs far faster than any living North American predator, and for decades that looked like an inexplicable luxury. The answer is in the fossils: until about twelve thousand years ago the American prairies held the American cheetah, Miracinonyx, along with lions and hyenas. Those hunters died out, the pronghorn did not, and it goes on running from a ghost. Its speed is the living proof of a predation that ended with the last ice age.

Next species

Indian rhinoceros

Rhinoceros unicornis