Artiodactyla pronghorn Section only 1 genus and 1 species. Between its origin between bovine and deer, horn in between, like horns and horn sheath into the heart of bone, both male and female angle, angle does not fall off, but they like the antlers as bifurcation angle, angle sheath is shed each year. But even dna analysis is still difficult to determine which pronghorn Branch and closer together. Branch angle antelope in North America in prehistoric times very prosperous ungulates, variety, and now exists only a pronghorn antilocapra americana, the original number of more substantial after the killing, the protected after the restore is another. Pronghorn distribution in the open areas of western North America, north to southern Canada, south to northern Mexico, is good at running, is America's fastest running animal. Have been due to reach the central angle of the branches (the actual part for the horn sheath) is named. Have a permanent male and female angle, but the angle of the outer sheath replaced annually. Angle of the bone, not a cavity, not forking. With its external to the outer hair sheath, in the fall after the breeding season each year, before falling below the old sheath grow new sheath. Vertical angle, side flat, tip bending backward. Angle of about 25 cm. Medium size, 1 to 1.5 meters in length, tail length of 7.5 ~ 10 cm tall at the shoulder 81 to 104 cm, weight 36 to 60 kg into the female body smaller than the males; the back of the red-brown, with black mane and neck, white belly and buttocks, face and neck, cheek pieces on both sides with black spots; hair is below the villi, and coated with coarse, brittle and the hair, skin and muscle due to some effect, and make their hair was different was point of view, in order to facilitate warming or cooling. Pronghorn distribution in southwestern Canada, western U.S. and northern Mexico, grassland and desert areas, is America's oldest ungulate. Between the origin of bovine and deer between. Artiodactyla Division pronghorn is the only one of a kind. Central angle in the angle of the branch sheath stretched forward, hence the name. Male and female are a permanent angle, angle of the bone, not a cavity, not forking. Angle sheath replaced annually. Vertical angle, side flat, tip bending backward. Angle of about 25 cm. Medium size, 1 to 1.5 meters in length, tail length of 7.5 ~ 10 cm tall at the shoulder 81 to 104 cm, weight 36 to 60 kg into the female body smaller than the males; the back of the red-brown, with black mane and neck, white belly and buttocks, face and neck, cheek pieces on both sides with black spots; hair is below the villi, and coated with coarse, brittle and the hair, skin and muscle due to some effect, and make their hair was different was point of view, in order to facilitate warming or cooling. Located in southwestern Canada, western U.S. and northern Mexico, grassland and desert areas. Between the origin of bovine and deer between. Pronghorn running speed, maximum speed of 80 km. A jump of up to 3.5 to 6 meters. Good swimming. Composed of small groups in summer, winter, the crowd assembled into hundreds. In search of food and water, often several times a year migration. Of alertness, visual acuity, can see objects a few kilometers away. Distress in the butt to erect white hair, which is a special warning to peer signals. Pronghorn to grass, shrubs, reeds, etc. for food, can tap the front foot plants buried in snow. If adequate grass, you can not drink. Summer mating. About 8 months pregnant, first child, usually middle 1 Aberdeen, Aberdeen, after 2 per child. As large number of human hunting, the number dropped. American continent pronghorn is the fastest running mammal, the maximum speed of 80 km. A jump of up to 3.5 to 6 meters. Good swimming. Composed of small groups in summer, winter, the crowd assembled into hundreds. In search of food and water, often several times a year migration. Of alertness, visual acuity, can see objects a few kilometers away. Distress in the butt to erect white hair, which is a special warning to peer signals. Pronghorn to grass, shrubs, reeds, etc. for food, can tap the front foot plants buried in snow. If adequate grass, you can not drink. Summer mating. About 8 months pregnant, first child, usually middle 1 Aberdeen, Aberdeen, after 2 per child. Early 19th century, the United States ten million pronghorn. But the people to take the meat, skin, and with its head for ornament, has a lot of killing. Nearly 100 years, the number dropped to less than 20,000. Present, because of strong protection, the number of great growth. Features Pronghorn marks the northern boundary of the new species. Produced in the Midwest. Adult body length 1.32-1.49 m, 0.83-0.94 m tall at the shoulder and weighing 40-59 kg. Back to soil yellow, white belly, neck and buttocks are prominent white spots, black nose, ear to the jaw under the often dark spots. Pronghorn is a form of volatile species. The number of chromosomes is not fixed, in a certain range. Individuals often have to grow additional pronghorn horns, nipples and ribs. 30% of the females generally have a lifetime is not long horn sheep, also president of the shape of the occasional exception of the uterus. Angle Under normal circumstances both male and female pronghorn horn, sheep horn female than male sheep small, unbranched, and have more features ram's horn, the end part of the fork, similar to the deer family members. Prehistoric pronghorn members of families of more sophisticated angle. Pronghorn horn base to the bone (similar to bovine), will not fall off, but some hair from the skin and coat are mixed to form mid-off angle (like deer). Pronghorn horned much faster than bovine animals. Eye In proportion to count, pronghorn's eyes are the largest North American ungulates, the diameter of 50mm; their growth position more than by other herbivores, the upper. This makes it have a broader vision, more easily found close to the enemy. And vision developed, to see the equivalent of 8 times for human use binoculars to see the effect of the distance. However, poor short-sighted, 10 meters away, then if people did not move, pronghorn will be difficult to detect the presence of people. Pronghorn are naturally curious animals, like there is no clear threat to close a number of characteristics of the new things. Hunters often use this, sit a white handkerchief waving, to lure the hidden pronghorn appeared. Hoof and coat And other cloven-hoofed ruminant animals, the pronghorn is not on the hoof, hoof (dewclaw) structure, and the side of the toe disappeared (this can be seen that the pronghorn is a highly evolved cloven-hoofed animals). Pronghorn spring moult, hairs on the chamber containing the complex has excellent insulation capabilities. Cheetah is adapted for high-speed evolution of running out of good flexible spine, and pronghorn on the run stocky body shape is slender limbs to adapt and increase the heart. High-speed running in the thin limbs can jump farther, pronghorn jumped up to 4.5-6 meters; the increased metabolic oxygen benefit the heart, reducing oxygen debt produced by exercise. And the deer is different pronghorn high jump ability, especially poor, can not jump across the fence, the fence so long tend to impede the migration of pronghorn. Habits image: gabelbock fws 2.jpg Natural enemies Pronghorn are the main predators are wolves, cougars and people. Coyotes, lynx and golden eagles are a threat to the lamb. In fact, the pronghorn evolved together with the North American cheetah in the running speed of 4 million years to compete with each other, so that nearly 100 kilometers per hour. Ten thousand years ago the late Pleistocene extinction wiped out the North American cheetah, the adult pronghorn have basically no natural enemies exist. Therefore, other animal attacks lamb became the main target of pronghorn. In the absence of cover in the prairie, lamb main enemies of Islam is to rely on camouflage body lying on the floor quietly fixed to avoid predators found. Ewes and lambs is a tacit understanding between the interesting phenomenon. Ewe lambs normally hide in the near circle, and it will put on a brave face on it to avoid being found in coyotes. Because coyotes are often suspicious of the ewes in the vicinity of patient observation. Ewe lamb hiding place for looking over frequency can be used to find the lamb coyote. 4 hours per ewe lambs at feeding time back. Hiding place and then replace the lamb. Ewes were quick to leave. Ewe's memory is amazing. Turn left before the ewes will lamb memorizing a new hiding place, a process that only 3 seconds. Ewes within a few hours later that is able to accurately find the lamb again. In order to avoid predators find repose for a long time to adapt to the ability of the lamb is still staggering. 3,4 west in North America, cold, wet weather in the month, the repose of the lamb can only generate a lot of body heat to maintain body temperature. In addition, until the last moment, lying still in a dangerous approach of the lamb is still able to maintain a state of rest. It has been in the North American bison and pronghorn on the coexistence of prairie found some lamb's feet were passing bison hoof and broke into two parts. Obviously, when bison hoof stepping down or stick lamb rest. Cougar occasionally use some hilly terrain to ambush pronghorn. Wolves sometimes with extraordinary stamina and strength to attack the pronghorn. But these are not on the pronghorn constitute a real threat, in addition to the gun people. Categories image: gabelbock-drawing.jpg Pronghorn pronghorn prehistoric many different types of families, according to the classification of fossils have been unearthed as follows: Pronghorn Division Pronghorn (antilocaprinae) subfamily proantilocapra osbornoceros piloceros sphenophalos ilingoceros texoceros antilocapra hayoceros stockoceros hexameryx hexobelomeryx caprameryx tetrameryx Ruminant teeth Ling (merycodontinae) subfamily paracosoryx merriamoceros ramoceros merycodus cosoryx Antelope subfamily members of ruminant teeth smaller size, about 10-18kg; pronghorn subfamily members are larger, about 20-130kg. Existing pronghorn is a one, according to the body color, body shape and body are divided into five subspecies. Pronghorn Division Pronghorn (antilocaprinae) subfamily Pronghorn (antilocapra) is Pronghorn (antilocapra americana) aa americana aa mexicana aa oregona aa peninsularis aa sonoriensis Conservation status It is estimated that the number of pronghorn in North America when the white man to reach approximately 35 million (one hundred million others said there), second only to the North American bison population size (bison bison). Reclamation in the western United States has drastically declined during 1924, was reduced to less than 30,000. Through conservation measures, has been restored to 200-300 million (including the U.S. and Canada) or more. Western United States is now the most common wild animals, is one of the major U.S. hunting hunting target, the annual hunting quota of 4000. Protection level: low-risk. Pronghorn Mexico and Asia species (aa mexicana) in the state of the poor, the role of remaining 1200, level of protection of an endangered animal. A small number of other protected Peninsula subspecies subspecies (aa peninsularis), and Soxhlet subspecies (aa sonoriensis) Pronghorn cites the level of protection for the appendix i, iucn level as a class.
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chajiaoling Pronghorn Antilocapra americana; pronghorn Artiodactyla pronghorn Section only 1 genus and 1 species (see Figure pronghorn shape). Have been due to reach the central angle of the branches (the actual part for the horn sheath) is named. Have a permanent male and female angle, but the angle of the outer sheath replaced annually. Angle of the bone, not a cavity, not forking. With its external to the outer hair sheath, in the fall after the breeding season each year, before falling below the old sheath grow new sheath. Vertical angle, side flat, tip bending backward. Angle of about 25 cm. Medium size, 1 to 1.5 meters in length, tail length of 7.5 ~ 10 cm tall at the shoulder 81 to 104 cm, weight 36 to 60 kg into the female body smaller than the males; the back of the red-brown, with black mane and neck, white belly and buttocks, face and neck, cheek pieces on both sides with black spots; hair is below the villi, and coated with coarse, brittle and the hair, skin and muscle due to some effect, and make their hair was different was point of view, in order to facilitate warming or cooling. Located in southwestern Canada, western U.S. and northern Mexico, grassland and desert areas, is America's oldest ungulate. Between the origin of bovine and deer between. American continent pronghorn is the fastest running mammal, the maximum speed of 80 km. A jump of up to 3.5 to 6 meters. Good swimming. Composed of small groups in summer, winter, the crowd assembled into hundreds. In search of food and water, often several times a year migration. Of alertness, visual acuity, can see objects a few kilometers away. Distress in the butt to erect white hair, which is a special warning to peer signals. Pronghorn to grass, shrubs, reeds, etc. for food, can tap the front foot plants buried in snow. If adequate grass, you can not drink. Summer mating. About 8 months pregnant, first child, usually middle 1 Aberdeen, Aberdeen, after 2 per child. Early 19th century, the United States ten million pronghorn. But the people to take the meat, skin, and with its head for ornament, has a lot of killing. Nearly 100 years, the number dropped to less than 20,000. Present, because of strong protection, the number of great growth. (Lin Yonglie)
