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Exploring the beautiful nature of California
California Nature: Bison
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Bison are part of the family Bovidae, to
which cattle and goats belong. They are not in the same family
that Asian and African buffalo are. However, because they
resembled these old world animals, the early explorers called
them by that name. Although it is a misnomer, the name buffalo
is still used interchangeably with bison. One of the physical
differences between the old world buffalo and the American bison
is the large shoulder hump of the bison. This hump, along with a
broad, massive head, short, thick neck and small hindquarters
give the animal its rugged appearance.
The color and character of the bison's fur
varies with the season. A mature bull in winter has a dark brown
to black coat. The length of the hair measures up to sixteen
inches on the forehead, ten inches on the forelegs, and only
eight inches on the hindquarters. No wonder the bison, unlike
domestic cattle, face into storms. |
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Bison usually appear peaceful, unconcerned, even lazy, yet they may attack anything,
often without warning or apparent reason. To a casual observer, a grazing bison
appears slow and clumsy, but he can outrun, out turn, and traverse rougher
terrain than all but the fleetest horse. They can move at speeds of up to
thirty-five miles per hour and cover long distances at a lumbering gallop.
Their most obvious weapon is the horns that both male and female have. But their
head, with its massive skull, can be used as a battering ram, effectively using
the momentum produced by two thousand pounds moving at thirty miles per hour!
The hind legs can also be used to kill or maim with devastating effect. At the
time bison ran wild, they were rated second only to the Alaska brown bear as a
potential killer, more dangerous than the grizzly bear. In the words of early
naturalists, they were a dangerous, savage animal who feared no other animal and
in prime condition could best any foe. A bull with lowered head, snorting and
pawing the ground, with tail stiffly upraised, conveys a universal warning of
danger to all nearby that is impossible to ignore!
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The rutting, or mating, season lasts from June through September
with peak activity in July and August. At this time, the older
bulls rejoin the herd and fights often take place between bulls.
The herd exhibits much restlessness during breeding season the
animals are belligerent, unpredictable and most dangerous.
Calves, born nine to nine and one-half months later in April or May, generally weigh thirty to seventy pounds. They have reddish-brown fur and do not have the conspicuous hump of the adult. After a few months, the fur begins to change to chocolate brown and the hump begins to develop.
Other activities of the bison include rubbing, rolling, and wallowing. Wallowing creates a saucer-like depression called a wallow. This wallow was once a common feature of the plains; usually these wallows are dust bowls without any vegetation. |
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Bison have poor eyesight but acute hearing and an excellent
sense of smell. The sounds they make range from a pig-like grunt
to an aggressive bellow.
Grizzly bears are powerful, top-of-the-food-chain predators, yet much of their
diet consists of nuts, berries, fruit, leaves, and roots. Bears also eat other
animals, from rodents to moose. Grizzlies are typically brown, though their fur can appear to be white-tipped,
or grizzled, lending them their traditional name.
Much has been written concerning the economic value of the bison to the American Indian. The bison sustained a way of life, providing food, clothing, shelter, and fuel. Extermination of the bison spelled the doom of American Indian independence.
In 1800, it was estimated there were forty million bison, by 1883, there were no wild bison in the United States. By 1900, there were less than six hundred left in North America. The majority of the forty million animals were killed in a fifty-five year period, beginning in 1830. Many people denounced the slaughter; few did anything to stop it. Fortunately, a small, devoted group of conservationists managed to save a few hundred. The bison we see and enjoy today were raised from these few survivors.
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Today, approximately 500,000 bison live
across North America. Most are not pure bison but rather have
been cross-bred with cattle in the past and are raised as
livestock on ranches. Fewer than 30,000 bison are in
conservation herds, and fewer than 5,000 are free-ranging and
disease-free. Cross breeding with cattle threatens the genetic
purity of bison. The few remaining genetically pure wild bison
must be conserved separate from cross-bred bison to protect pure
bison genes.
The trails carved by animals like bison and deer in their
seasonal migrations formed some of the earliest traceable paths
into the American wilderness, and were followed by Native
Americans, explorers and pioneers.
To help overcome the challenges faced by American bison, several
scientists, government agencies, tribes, first nations, and
non-governmental organizations are working together to conserve
North America’s bison. The Bison Specialist Group of the World
Conservation Union’s Species Survival Commission is drafting a
status report and conservation action plan for North American
bison.
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Bats
Bears
Bison
Bobcat
Chipmunks
& Squirrels
Deer & Elk
Feral Horses
Foxes
Gophers
Gray Wolf
Jaguar
Mice & Rats
Mountain Lion
Porcupine
Rabbits
& Hares
Raccoons
River Otter
Sheep
Shrews, Moles,
& Opossum Skunks
Weasels & Minks
Wolverine and Badger |
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