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What Happens When a Keystone Species Goes Extinct?
science.howstuffworks.com/environmental/conservation/issues/keystone-species-extinct.htm
Keystone species in an ecosystem function much like a keystone in an arch. Without them the structure collapses. Learn about keystone species.
Animal Classification: A Taxonomy for All Living Things
animals.howstuffworks.com/animal-facts/animal-classification.htm
The taxonomy that Carl Linnaeus introduced in "Systema Naturae" set the stage for a uniform animal classification system.
6 Wild Cats Still Found Roaming the U.S.
animals.howstuffworks.com/mammals/wild-cats-in-us.htm
HowStuffWorks takes a look at six large cats still to be found existing in the wild in the United States.
The Pallas's Cat Is the Original Grumpy Wildcat
animals.howstuffworks.com/mammals/pallas-cat.htm
Pallas's cats appear cantankerous, in part due to their flat faces and large, owl-like eyes with round pupils.
How Animal Imprinting Works
animals.howstuffworks.com/animal-facts/animal-imprinting.htm
Animal imprinting concerns how some species of animals learn during a short period immediately after birth. Learn more about animal imprinting.
The American Red Squirrel Is Small, Territorial and Aggressive
animals.howstuffworks.com/mammals/red-squirrel.htm
Red squirrels have a big attitude, which might have to due with their small size. They have to act big. And they do so with noisy and aggressive behavior.
This Spirit Bear Is Neither Albino Nor a Polar Bear
animals.howstuffworks.com/mammals/spirit-bear.htm
A spirit bear looks almost mythical when it appears along a salmon river in the Great Bear Rainforest. The animal's creamy white coat stands out against the dark forest and fast rivers of coastal British Columbia.
Why Scientists Put Tiny 3-D Glasses on a Praying Mantis
animals.howstuffworks.com/insects/tiny-3d-glasses-praying-mantis.htm
have determined mantises use stereopsis to see the world. Learn more about mantises with 3-D glasses in this HowStuffWorks Now article.
Alligator Snapping Turtles Lure Prey With Wriggling Worm-like Tongue Appendage
animals.howstuffworks.com/reptiles/alligator-snapping-turtle.htm
The prehistoric-looking alligator snapping turtle is the largest freshwater turtle in North America and has a bite that, it's said, can snap a wooden broom handle in half.
What's the Difference Between a Brown Bear and a Black Bear?
animals.howstuffworks.com/mammals/brown-bear.htm
Yes, the obvious fur color seems like a dead giveaway, but you can't always judge a bear by the color of its fur.