Post by DinosaurMichael on Sept 24, 2013 20:35:58 GMT 5
American Bison - Bison bison
The American bison (Bison bison), also commonly known as the American buffalo, is a North American species of bison that once roamed the grasslands of North America in massive herds. Their range once roughly comprised a triangle between the Great Bear Lake in Canada's far northwest, south to the Mexican states of Durango and Nuevo León, and east along the western boundary of the Appalachian Mountains. Because of commercial hunting and slaughter in the 19th century, the bison nearly went extinct and is today restricted to a few national parks and other reserves. Two subspecies or ecotypes have been described: the plains bison (Bison bison bison), smaller in size and with a more rounded hump, and the wood bison (Bison bison athabascae) – the larger of the two and having a taller, square hump. Furthermore, it has been suggested that the plains bison consists of a northern (Bison bison montanae) and a southern subspecies, bringing the total to three. However, this is generally not supported. The wood bison is one of the largest species of bovid in the world, surpassed by only the Italian Chianina, the Asian gaur and wild Asian water buffalo. It is the largest extant land animal in North America. A bison has a shaggy, long, dark brown winter coat, and a lighter weight, lighter brown summer coat. As is typical in ungulates, the male bison are slightly larger than the female. Plains bison are often in the smaller range of sizes, and Wood bison in the larger range. Head-and-body length ranges from 2 to 3.5 m (6.6 to 11.5 ft) long, the tail adding 30 to 91 cm (12 to 36 in). Shoulder height in the species can range from 152 to 186 cm (60 to 73 in). Typical weigh can range from 318 to 1,000 kg (700 to 2,200 lb). The heaviest wild bull ever recorded weighed 1,270 kg (2,800 lb). When raised in captivity and farmed for meat, the bison can grow unnaturally heavy and the largest semi-domestic bison weighed 1,724 kg (3,800 lb). The heads and forequarters are massive, and both sexes have short, curved horns that can grow up to 2 feet (61 cm) long, which they use in fighting for status within the herd and for defense. Bison are herbivores, grazing on the grasses and sedges of the North American prairies. Their daily schedule involves two-hour periods of grazing, resting and cud chewing, then moving to a new location to graze again. Bison mate in August and September; gestation is 285 days. A single reddish-brown calf nurses until the next calf is born. If the cow is not pregnant, a calf will nurse for 18 months. Bison cows are mature enough to produce a calf at 3 years of age. Bison bulls may try to mate with cows at 3 years of age, but if more mature bulls are present, they may not be able to compete until they reach 5 years of age. Bison have a life expectancy of approximately 15 years in the wild and up to 25 years in captivity.
Cape Buffalo - Syncerus caffer
The African buffalo, affalo, nyati, Mbogo or Cape buffalo (Syncerus caffer) is a large African bovine. It is not closely related to the slightly larger wild Asian water buffalo, but its ancestry remains unclear. Owing to its unpredictable nature which makes it highly dangerous to humans, it has not been domesticated, unlike its Asian counterpart, the domestic Asian water buffalo. The African buffalo is a very robust species. Its shoulder height can range from 1 to 1.7 m (3.3 to 5.6 ft) and its head-and-body length can range from 1.7 to 3.4 m (5.6 to 11 ft). The tail can range from 70 to 110 cm (28 to 43 in) long. Savannah type buffaloes weigh 500 to 910 kg (1,100 to 2,000 lb), with males, normally larger than females, reaching the upper weight range. A record-sized savannah-type male weighed 1,000 kg (2,200 lb). Forest type buffaloes, at 250 to 455 kg (550 to 1,000 lb), are only half that size. Its head is carried low, its top located below the backline. The front hooves of the buffalo are wider than the rear, which is associated with the need to support the weight of the front part of the body, which is more powerful than the back. Savannah type buffalo have black or dark brown coats with age. Old bulls have whitish circles around their eyes. Females tend to have more reddish coats. Forest type buffalo are reddish brown in colour with horns that curve out backwards and upwards. Calves of both types have red coats. The horns of African buffalo are very peculiar. A characteristic feature of them is the fact that the adult bull's horns have fused bases, forming a continuous bone shield referred to as a "boss," which can not always be penetrated even by a rifle bullet. From the base the horns diverge, then bend down, and then smoothly curve upwards and outwards. The distance between the ends of the horns of large bulls is more than a metre. The young buffalo horn boss forms fully only upon reaching the age of 5–6 years. In cows the horns are, on average, 10-20% less, and the boss is less prominent. Forest buffalo horns are much smaller and weaker than those of the savannah buffaloes and are almost never fused. They rarely reach a length of even 40 cm.
The American bison (Bison bison), also commonly known as the American buffalo, is a North American species of bison that once roamed the grasslands of North America in massive herds. Their range once roughly comprised a triangle between the Great Bear Lake in Canada's far northwest, south to the Mexican states of Durango and Nuevo León, and east along the western boundary of the Appalachian Mountains. Because of commercial hunting and slaughter in the 19th century, the bison nearly went extinct and is today restricted to a few national parks and other reserves. Two subspecies or ecotypes have been described: the plains bison (Bison bison bison), smaller in size and with a more rounded hump, and the wood bison (Bison bison athabascae) – the larger of the two and having a taller, square hump. Furthermore, it has been suggested that the plains bison consists of a northern (Bison bison montanae) and a southern subspecies, bringing the total to three. However, this is generally not supported. The wood bison is one of the largest species of bovid in the world, surpassed by only the Italian Chianina, the Asian gaur and wild Asian water buffalo. It is the largest extant land animal in North America. A bison has a shaggy, long, dark brown winter coat, and a lighter weight, lighter brown summer coat. As is typical in ungulates, the male bison are slightly larger than the female. Plains bison are often in the smaller range of sizes, and Wood bison in the larger range. Head-and-body length ranges from 2 to 3.5 m (6.6 to 11.5 ft) long, the tail adding 30 to 91 cm (12 to 36 in). Shoulder height in the species can range from 152 to 186 cm (60 to 73 in). Typical weigh can range from 318 to 1,000 kg (700 to 2,200 lb). The heaviest wild bull ever recorded weighed 1,270 kg (2,800 lb). When raised in captivity and farmed for meat, the bison can grow unnaturally heavy and the largest semi-domestic bison weighed 1,724 kg (3,800 lb). The heads and forequarters are massive, and both sexes have short, curved horns that can grow up to 2 feet (61 cm) long, which they use in fighting for status within the herd and for defense. Bison are herbivores, grazing on the grasses and sedges of the North American prairies. Their daily schedule involves two-hour periods of grazing, resting and cud chewing, then moving to a new location to graze again. Bison mate in August and September; gestation is 285 days. A single reddish-brown calf nurses until the next calf is born. If the cow is not pregnant, a calf will nurse for 18 months. Bison cows are mature enough to produce a calf at 3 years of age. Bison bulls may try to mate with cows at 3 years of age, but if more mature bulls are present, they may not be able to compete until they reach 5 years of age. Bison have a life expectancy of approximately 15 years in the wild and up to 25 years in captivity.
Cape Buffalo - Syncerus caffer
The African buffalo, affalo, nyati, Mbogo or Cape buffalo (Syncerus caffer) is a large African bovine. It is not closely related to the slightly larger wild Asian water buffalo, but its ancestry remains unclear. Owing to its unpredictable nature which makes it highly dangerous to humans, it has not been domesticated, unlike its Asian counterpart, the domestic Asian water buffalo. The African buffalo is a very robust species. Its shoulder height can range from 1 to 1.7 m (3.3 to 5.6 ft) and its head-and-body length can range from 1.7 to 3.4 m (5.6 to 11 ft). The tail can range from 70 to 110 cm (28 to 43 in) long. Savannah type buffaloes weigh 500 to 910 kg (1,100 to 2,000 lb), with males, normally larger than females, reaching the upper weight range. A record-sized savannah-type male weighed 1,000 kg (2,200 lb). Forest type buffaloes, at 250 to 455 kg (550 to 1,000 lb), are only half that size. Its head is carried low, its top located below the backline. The front hooves of the buffalo are wider than the rear, which is associated with the need to support the weight of the front part of the body, which is more powerful than the back. Savannah type buffalo have black or dark brown coats with age. Old bulls have whitish circles around their eyes. Females tend to have more reddish coats. Forest type buffalo are reddish brown in colour with horns that curve out backwards and upwards. Calves of both types have red coats. The horns of African buffalo are very peculiar. A characteristic feature of them is the fact that the adult bull's horns have fused bases, forming a continuous bone shield referred to as a "boss," which can not always be penetrated even by a rifle bullet. From the base the horns diverge, then bend down, and then smoothly curve upwards and outwards. The distance between the ends of the horns of large bulls is more than a metre. The young buffalo horn boss forms fully only upon reaching the age of 5–6 years. In cows the horns are, on average, 10-20% less, and the boss is less prominent. Forest buffalo horns are much smaller and weaker than those of the savannah buffaloes and are almost never fused. They rarely reach a length of even 40 cm.
