pronghorn


pronghorn
/prawng"hawrn', prong"-/, n., pl. pronghorns, (esp. collectively) pronghorn.
a fleet, antelopelike ruminant, Antilocapra americana, of the plains of western North America: now greatly reduced in number and endangered in some areas. Also called pronghorn antelope.
[1805-15; PRONG + HORN]

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Ruminant (Antilocapra americana) of North American plains and semideserts, the only living member of the family Antilocapridae.

The pronghorn stands 30–40 in. (80–100 cm) tall. It is reddish brown with a short, dark-brown mane, white underparts, two white bands on the throat, and a circular white patch on the rump. Both sexes bear erect, two-pronged horns; the longer prong curves backward, the shorter prong forward. Pronghorns live alone or in small bands in summer, and in large herds in winter. The fastest mammal of North America, the pronghorn can run 45 mph (70 kph) and can bound up to 20 ft (6 m). Though tens of millions once roamed the West, they were nearly exterminated by hunters in the early 20th century; conservation efforts have since allowed their populations to increase.

Pronghorn (Antilocapra americana).

Leonard Lee Rue III

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mammal
also called  American antelope 

      North American hoofed mammal, the sole living member of the old ruminant family Antilocapridae (order Artiodactyla (artiodactyl)). It is the only animal that has branching horns and sheds them annually. This graceful denizen of open plains and semideserts is reddish brown and white in colour, with a short, dark brown mane, white underparts, two white bands on the throat, and a large circular white patch of long hair on the rump. The rump patch can be suddenly erected to warn other pronghorns of danger; the flash of white from the rump patch can be seen by a human for 3–4 km (2–2.5 miles). Its common name to the contrary, it is not closely related to the antelopes (antelope).

 Pronghorns stand about 80–100 cm (2.5–3.25 feet) at the shoulder; large northern males weigh about 40 kg (90 pounds) and the females slightly less. They are highly evolved runners. Faster than any Old World antelope, they can attain a speed of 70 km (40 miles) per hour and leap 6 metres (20 feet) at a bound. With eyes as large as those of elephants (elephant), pronghorns have astonishingly acute vision and can readily identify predators at distances of up to 1 km (0.6 mile). Their extreme adaptations reflect the severe predation on pronghorns during the Ice Age.

 Both sexes bear horns. Those of the male are longer and branch into two prongs; the longer curves backward and the shorter projects forward. Pronghorn bucks shed their horns in October after the mating season. The horns grow during winter and are fully grown just before the territorial contests of the bucks in spring.

      The short mating season is in late summer and early fall. Bucks on fertile pastures become territorial and mate in seclusion with females that have entered estrus. In dry areas bucks may form harems. Pronghorns use the summer's vegetation to replenish the energy lost by their mating activities, and consequently they have a very long gestation period (250 days) for their small body size. Females implant half a dozen or more embryos, but only two survive, one in each of the two uterine horns. Thus, twin births are normal. The extra embryos succumb to intrauterine competition, in which embryos kill off their neighbours using outgrowth from their fetal membranes that penetrates and dispatches the losers.

 Pronghorns normally live in small bands in summer, but they may form large herds in winter. They are found from Alberta to northern Mexico. Nearly exterminated in the late 19th century, pronghorns have returned to great abundance with the help of dedicated conservation efforts. Today they are common game animals. Only the small desert-adapted Sonoran pronghorn of southern Arizona and northern Mexico and the peninsular pronghorn of Baja California remain endangered.
 

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Universalium. 2010.

Look at other dictionaries:

  • pronghorn — ☆ pronghorn [prôŋ′hôrn΄ ] n. pl. pronghorns or pronghorn the only species (Antilocapra americana) of a family (Antilocapridae) of ruminants of Mexico and the W U.S., having curved horns, each with one prong, that are shed annually: resembles both …   English World dictionary

  • Pronghorn — Prong horn , n. (Zo[ o]l.) An American antelope ({Antilocapra Americana}), native of the plain near the Rocky Mountains. The upper parts are mostly yellowish brown; the under parts, the sides of the head and throat, and the buttocks, are white.… …   The Collaborative International Dictionary of English

  • pronghorn — ● pronghorn nom masculin (anglais prong, pointe, et horn, corne) Antilope à cornes fourchues aux étuis caducs, seul représentant de la famille des antilocapridés …   Encyclopédie Universelle

  • Pronghorn — Taxobox name = Pronghorn status = LC status system = iucn3.1 status ref = [IUCN2006|assessors=Antelope Specialist Group|year=1996|id=1677|title=Antilocapra americana|downloaded=12 May 2006] image width = 280px image caption = A pronghorn near… …   Wikipedia

  • Pronghorn — Antilocapra americana Antilocapra americana …   Wikipédia en Français

  • Pronghorn — Gabelbock Männlicher Gabelbock (Antilocapra americana) Systematik Überordnung: Laurasiatheria …   Deutsch Wikipedia

  • pronghorn — noun (plural pronghorn or pronghorns) Date: 1823 a swift horned ruminant mammal (Antilocapra americana) chiefly of grasslands and deserts of western North America that resembles an antelope called also pronghorn antelope …   New Collegiate Dictionary

  • pronghorn — šakiaragis statusas T sritis zoologija | vardynas taksono rangas rūšis atitikmenys: lot. Antilocapra americana angl. pronghorn; pronghorn antelope vok. Gabelbock; Gabelhornantilope rus. вилорог pranc. antilope à cornes fourchues; antilope… …   Žinduolių pavadinimų žodynas

  • pronghorn — noun A North American mammal, Antilocapra americana, resembling an antelope, also called pronghorn antelope …   Wiktionary

  • pronghorn — (also pronghorn antelope) noun a deer like North American mammal with a stocky body, long slim legs, and black horns. [Antilocapra americana.] …   English new terms dictionary


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