News tagged with beavers
Beaver
The beaver (genus Castor) is a primarily nocturnal, large, semi-aquatic rodent. Castor includes two extant species, North American Beaver (Castor canadensis) (native to North America) and Eurasian Beaver (Castor fiber) (Eurasia). Beavers are known for building dams, canals, and lodges (homes). They are the second-largest rodent in the world (after the capybara). Their colonies create one or more dams to provide still, deep water to protect against predators, and to float food and building material. The North American beaver population was once more than 60 million, but as of 1988 was 6–12 million. This population decline is due to extensive hunting for fur, for glands used as medicine and perfume, and because their harvesting of trees and flooding of waterways may interfere with other land uses.
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World's biggest beaver dam discovered in northern Canada
A Canadian ecologist has discovered the world's largest beaver dam in a remote area of northern Alberta, an animal-made structure so large it is visible from space.
May 06, 2010 |
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Scientist discovers beavers building prime salmon habitat in Skagit Delta
As sometimes happens with science, Greg Hood went looking for one thing, and found something else: tidal beavers.
May 24, 2009 |
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Officials say beaver teeth are 7 million years old
(AP) -- The Bureau of Land Management says a fossil found by employees on federal land represents the earliest record of living beavers in North America.
Other Sciences / Archaeology & Fossils
Sep 19, 2011 |
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Beaver dam partly contains Canada oil spill
An oil spill near the native village of Little Buffalo in Canada's Alberta province was partly contained by a beaver dam, a provincial environment official said Wednesday.
May 05, 2011 |
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The ecosystem engineer: Research looks at beavers' role in river restoration
When engineers restore rivers, one Kansas State University professor hopes they'll keep a smaller engineer in mind: the North American beaver.
Jan 03, 2011 |
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Shifting Baselines Confound River Restoration
Steep reductions in the abundance of fish, shellfish, and other aquatic fauna in recent centuries are not restricted to animals that live in the sea: historical records show that species in rivers and lakes worldwide also ...
Sep 01, 2009 |
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