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Wolves
are amazing creatures! You probably know something about them
from fairy tales like, "Little Red Riding Hood, or "The
Three Little Pigs". In those stories the wolves act like
scary and evil creatures. There are many other folk tales where
wolves look silly, helpful and even wise. Are wolves misunderstood?
Are they dangerous? What are they really like?
A
good way to understand wolves is to learn more about them, not from
fairy tales, but from scientific research.
Let's
begin our fact finding mission about wolves now!
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What problems
are there from learning about wolves from folk tales?
Wolf
Stories
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Classification
In order for scientists to be able to
understand each other no matter what language they speak they have an
international way of naming living organisms. The scientific names are
written in a language called Latin.
This system of classification was established
by Carl
Linneaus in the 1750's. Learn
more about the science of naming things, "Taxonomy".
Explore the Tree of
Life from the University of Arizona.
Some
important details about wolves are that they are mammals, (like cats,
deer, elephants and dolphins) and they are carnivores,
a group of mammals that eats meat. They belong to the dog family called,
"Canidae" which also includes coyotes, jackals, dingoes and
the domestic dog.
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Wolf
Classification
The
Canids
of North America are wolves, coyotes, and foxes.
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Every
dog is descended from wolves that were tamed in the Middle East
about 12,000 years ago. At that time, wolves probably ate the scraps
of food left by humans. People soon realized that wolves could lead
them to food. Humans hand-raised wolf pups who then accepted the
humans as their leaders. |
Wolves
can eat about 25% of their body weight in one meal! If you weigh
80 pounds, would have to eat 20 pounds of food at one meal to be
like a wolf! |
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Lots
of Facts 
2 species of wolves occur in North America, gray wolves (Canis
lupus), and red wolves (Canis rufus). We'll study the Gray Wolf, the
one that lives in Idaho.
Colors:
Wolves vary in color from white to
gray, brown, and black. Arctic
Wolves are white so that they blend into the snow.
Weight
and Height: |
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Average length
(tip of nose to tip of tail):
females: 4.5 to 6 feet
males: 5 to 6.5 feet
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Average height
(at the shoulder):
26 to 32 inches
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Average weight:
females: 60 to 80 pounds
males: 70 to 110 pounds
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Life Span:
They can live up to 13 years in the wild, but the average life-span is
6-8 years.
Speed:
They can run for short distances at speeds of about 35 mph.
Numbers:
There are an estimated 9, 000 wolves in Alaska and about 4,000 in Minnesota,
Wisconsin, and Michigan. There are about 200,000 wolves in the whole
world, but there used to be about 2 million.
Take
a look at Fast Facts from PBS's
NOW.
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Range
During the 1800's the gray wolves ranged all over North America
and the red wolf occurred in the southeast US. When settlers first
moved into the west there were many animals to hunt, especially
buffalo. Slowly the settlers hunted more and more animals until
many were almost eliminated. When the deer, bison, elk and moose
were almost depleted, wolves turned to domestic livestock like
cattle and sheep for food. In the late 1800's wolves were eliminated
from most of the lower 48 states by shooting, trapping, and poisoning.
Today the range of gray wolves in
the US is: Alaska, Idaho, Michigan, Minnesota, Montana, Wisconsin,
and Wyoming.
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Habitat
Gray wolves live in forests, and alpine and arctic
tundra. A large pack's home range or territory covers 100
to 260 square miles in forested areas but about 1200 square miles
on the tundra.
They defend their home range from intruders by scent-marking,
body language and howling. Listen to wolf
howls.
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On
a calm night, howls can be heard from as far away as 120 miles.
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Food
and Hunting Wolves are carnivores
and normally eat large ungulates
such as white-tailed deer, mule deer, moose, caribou, elk, Dall sheep,
and bighorn sheep. They sometimes eat smaller mammals, like rabbits,
beavers, voles, lemmings, ground squirrels and snowshoe hare. They also
eat carrion.
Gray wolves are important to the balance
of the food chain because they help to control the number of caribou
and other ungulates so the herds won't get too large. If the herds become
too big there isn't enough food for everyone in the herd and they may
become sick and weak. Wolves hunt the sick animals so the disease won't
spread. Uncover more about wolf Predation
on Ungulates
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A
wolf's nose is so sensitive that it can smell prey that is more than
a mile away.
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Wolf
Puppies The alpha female has her puppies in April or May in
a den (which could be a rock cave, crevice
or a hole in the ground.) Baby wolves get a lot of loving care
from the moment they are born: they are well fed, cleaned, and protected.
The
pups leave the den when they are 4 weeks old but stay close by,
in case of danger. If the mother goes hunting another member of
the pack "baby-sits". After they are weaned from their
mother's milk they eat regurgitated meat brought to them by other
pack members. At about 7 - 8 months the pups begin traveling as
a part of the pack an learn how to hunt. Wolf pups love to play by stalking
and pouncing on their brothers and sisters. They also have special wolf
"toys" like skins of animals, bones and feathers feathers.
The skills they learn while playing will help them when they begin to
hunt.
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Marc Johnson holding
a wolf pup in Yellowstone National Park
Wolf
Families
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Even
though wolves are social among themselves, they usually avoid human contact.
In the past 100 years, there have been several published reports of human
injuries, but no fatalities, due to wolves. (http://www.pbs.org/now/shows/233/gray-wolf-facts.html) |
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How
do scientists gather all this information about wolves and manage
wolf populations? First, scientists must be great observers. They
can study animal tracks, and scent marks left by wolves. Scientists
also use special equipment to study animals. Radio-telemetry
and Global Positioning Systems help researchers to follow movements
of a wolf. Binoculars and spotting scopes let them observe from far
away. Learn
more about scientist tools and methods... then visit out wolf links
as you continue your fact-finding mission and become an expert about
wolves. Read
about Wolves in Idaho.
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