Welcome to the World of Beavers
Beavers
Castor canadensis
Also known as: American beaver
Average lifespan: 10–12 years in the wild (up to 20 in captivity)
Primary habitat: Rivers, streams, ponds, and wetlands
Geographic range: North America
Overview
Beavers are large, semi-aquatic rodents famous for building dams and lodges that reshape entire landscapes. Through their construction activities, they create wetlands that support countless other species. Often called “ecosystem engineers,” beavers play a critical role in maintaining healthy freshwater environments.
What It Looks Like
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Large, stocky body covered in dense brown fur
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Broad, flat, paddle-shaped tail
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Prominent orange front teeth
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Webbed hind feet for swimming
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Small eyes and ears positioned high on the head
How It Behaves
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Mostly nocturnal
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Highly social, living in family groups
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Builds dams to control water levels
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Communicates using tail slaps and scent marking
What It Eats
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Tree bark and cambium
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Leaves, twigs, and aquatic plants
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Strictly herbivorous
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Stores food underwater for winter use
Life Cycle
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Mating occurs in winter
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Gestation lasts about 105 days
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Females give birth to 1–4 kits
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Kits stay with parents for up to two years
Survival Skills
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Powerful teeth that grow continuously
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Waterproof fur for insulation
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Tail used for balance, swimming, and warning signals
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Engineering ability to create safe habitats
Fast Facts
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National animal of Canada
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Teeth are orange due to iron-rich enamel
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Can change entire river systems
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Dams help reduce flooding and drought effects
Conservation
Beavers are powerful ecosystem engineers that create wetlands by building dams, which slow water flow, reduce flooding, improve water quality, and provide habitat for countless plants and animals. Once heavily trapped for fur and still threatened in some regions by habitat loss, water management conflicts, and climate-driven droughts, beavers can struggle to maintain stable populations. Conservation and reintroduction efforts have shown that protecting beavers helps restore degraded ecosystems, increase biodiversity, and strengthen natural resilience to climate change.