Grizzly Bears

Emily RecliteMr. Buchmann

Biology 0 Period29 April 2011

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Statistics• The scientific name is Ursus arctos horriblis

• Weight can range from 300-850 lbs for males and 200-450 in females.

• They are 3- 3 ½ feet at the shoulders, but can stand about 8 feet tall.

• Grizzly bears can live about 20-30 years in the wild, and can live more than 40 years in captivity.

• They have a hump of muscles on top of their shoulders. Their coat can range from a silver color to an almost black color.

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Habitat

• Grizzly bears can be found in a number of different habitats from dense forests, to subalpine meadows and arctic tundra.

• In North America they can be found in western Canada, Alaska, Wyoming, Montana, Idaho,

and Washington.

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BehaviorBehavior• They live solitary except during breeding, club rearing, and They live solitary except during breeding, club rearing, and

areas with an abundant source of food such as salmon areas with an abundant source of food such as salmon streams.streams.

• Grizzly Bears go into their dens between October and Grizzly Bears go into their dens between October and December and stays in there until early spring. They don’t December and stays in there until early spring. They don’t really hibernate and can easily be woken up in the winter.really hibernate and can easily be woken up in the winter.

• They usually find food in the early morning and evening They usually find food in the early morning and evening and rests during the day.and rests during the day.

• Their territory can range between 70-400 square miles Their territory can range between 70-400 square miles away, but more than one bear can live in the territory. They away, but more than one bear can live in the territory. They will fight for food if necessary.will fight for food if necessary.

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Diet

• The grizzly bear is omnivorous and eats berries, The grizzly bear is omnivorous and eats berries,

roots, fungi, grasses, small fish, carrion, small mammals, roots, fungi, grasses, small fish, carrion, small mammals,

and insects.and insects.

• They are very good at catching fish and often use their long claws to dig They are very good at catching fish and often use their long claws to dig insects out of rotting logs and small mammals out if their burrows.insects out of rotting logs and small mammals out if their burrows.

• In captivity they are fed kale, dog food, monkey biscuits, smelt, NBC In captivity they are fed kale, dog food, monkey biscuits, smelt, NBC carnivore meat, a variety of fruits and vegetables, peanut butter, and fish.carnivore meat, a variety of fruits and vegetables, peanut butter, and fish.

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AdaptationsAdaptations

• Grizzly bears have a great ability to hear and Grizzly bears have a great ability to hear and smell, but they have poor eyesight.smell, but they have poor eyesight.

• They have a heavy, fleecy undercoat to protect They have a heavy, fleecy undercoat to protect them from the cold.them from the cold.

• They are very good swimmersThey are very good swimmers

• Only cubs can climb trees.Only cubs can climb trees.

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Population

• Historically, there wear about 50,000 grizzly bears in North America. Today there are 1,000-1,200 remaining in five separate populations in the lower 48 states.

• However, in Alaska

there are thought to

be 30,000 grizzly bears.

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Works Cited• Mertz, Leslie Ann. "Bears (Ursidae)." Grzimek's Animal Life Encyclopedia.

Ed. Michael Hutchins, et al. 2nd ed. Vol. 14: Mammals III. Detroit: Gale, 2004. 295-307. Gale Virtual Reference Library. Web. 28 Apr. 2011.

• "Grizzly Bear." Defenders of Wildlife, 2011. Web. 2 May 2011. •  "Grizzly Bear - Ursus Arctos - NatureWorks." New Hampshire Public

Television - Engage. Connect. Celebrate. New Hampshire Public Television, 2011. Web. 02 May 2011. <http://www.nhptv.org/natureworks/grizzly.htm>.

• King, Judith: Wildlife Fact File. Pittsburg, PA.: International Masters Publishers, 1997

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