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Bison
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More About Bisons ...
The American Bison (Bison bison), often called buffalo, is the largest terrestrial mammal in North America, bovine mammal that formerly roamed the open plains of the United States and Canada in massive herds, ranging from the Great Slave Lake to Mexico and from eastern Oregon almost to the Atlantic Ocean. There are two sub-species, Plains bison (flat back) and Wood bison (large humped back).

Bison have a shaggy, dark brown winter coat, and a lighter brown (and lighter weight) summer coat. Bison can reach over 6 ft (2 m) tall, 10 ft (3 m) long and weigh over 2,000 lb (900 kg). The heads and forequarters are massive, and both sexes have short, curved horns, which they use in fighting for status within the herd and defense. Bison mate in August and September; a single reddish-brown calf is born the following spring, and nurses for a year. Bison are mature at three years of age, and have a life expectancy of 1822 years.

Calves are born with a light brown fur coat which darkens as the animal matures. One very rare condition results in the white buffalo, where the calf has an entirely white coat. It is not to be confused with albino, since pigment still exists in the skin, hair, and eyes, and the animals will end up with a brown-colored coat as they mature. White buffalo are considered sacred by many Native Americans.

Bison were central to the lifestyle of the Plains Indians. Before the introduction of horses, buffalo were herded into large chutes made of rocks and willow branches and then stampeded over cliffs. These buffalo jumps are found in several places in the US and Canada.

Bison were hunted almost to extinction in the 19th century; as few as 750 bison existed in 1890. The Bronx Zoo maintained a remnant herd, from which populations were re-established in Yellowstone National Park and other wildlife preserves, beginning early in the 20th century. Some of these came from Charles Goodnight's ranch in the Texas Panhandle. A variety of privately-owned herds have also been established, starting from this population. The current American Bison population is estimated at 350,000, compared to an estimated 60100 million before Columbus.

Hunters were paid by large railroad concerns to destroy entire herds for several reasons:

The herds formed the basis of the economies of local Plains tribes of Native Americans.
Herds of these large animals on tracks could damage locomotives when the trains failed to stop in time.
Herds often took shelter in the artificial cuts formed by the grade of the track winding though hills and mountains in harsh winter conditions. This could hold up a train for days.
Taxonmony
Phylum: Chordata
Class: mammalia
Order: Artiodactyla
Family: Bovidae
Source: Wikipedia Read more about Bisons
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