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beaver
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American beaver Cross-sectional illustration of a beaver lodge built from sticks and mud, showing labeled chambers for eating and nesting, with underwater entrances leading into the structure. A beaver (Castor canadensis) is resting inside, surrounded by water and forest. Snow-capped mountains rise behind a dense evergreen forest and a reflective lake in Wrangell-St. Elias National Park, Alaska.
How new beaver dams might damage the environment
What is a trophic cascade?
A Eurasian beaver sits on a muddy, grassy shore surrounded by green plants in Baden-Wuerttemberg, Germany.
Reviving the Eurasian beaver population
Follow a beaver family and its kits for a year in the Rocky Mountains and learn about their habits and habitat
At a Glance
American beaver
beaver summary
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Dromedary camels (Camelus dromedarius). Animals, mammals.
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Lion (panthera leo)
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Young chimpanzee dressed in a shirt and sweater vest, scratching his head thinking. (primates)
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Videos

How new beaver dams might damage the environment
Learn about a toxic downside to restoration of beaver habitat: a temporary spike...
Video: © American Chemical Society (A Britannica Publishing Partner)
What is a trophic cascade?
Learn how small changes in the food pyramid can upend the ecosystem.
Video: Encyclopædia Britannica, Inc.
Reviving the Eurasian beaver population
Learn about Eurasian beavers.
Video: Contunico © ZDF Studios GmbH, Mainz
Follow a beaver family and its kits for a year in the Rocky Mountains and learn about their habits and habitat
Adult beavers and kits (Castor canadensis) in the Rocky Mountains.
Video: Encyclopædia Britannica, Inc.

Images

American beaver
American beaver (Castor canadensis), which is also known as the North American...
Karl Maslowski
beaver lodge
Beaver lodge in cross section.
Encyclopædia Britannica, Inc.
Beaver pond near the Wrangell Mountains
A beaver pond with the Wrangell Mountains in the background, Wrangell–St. Elias National...
© andyKRAKOVSKI—iStock/Getty Images
Eurasian beaver
Eurasian beaver (Castor fiber).
© Meyers—blickwinkel/Alamy
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