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Backpacker Magazine – September 2008

See More Beavers

America's largest rodent may be clumsy on land, but in water, it's a marvel of design.

by: Cameron Walker

PAGE 1 2
(Photo by Josh Miller)
(Photo by Josh Miller)
(Illustration by Bryon Thompson)
(Illustration by Bryon Thompson)

Thank goodness for fickle fashion. If beaver hats hadn't gone out of style in Europe in the 1830s, fur traders might have trapped North America's largest rodent to extinction–bad news for the scores of animals that depend on the nutrient-rich wetlands these natural engineers create. Beaver dams also help filter water, reducing pollution and keeping sediment from clogging downstream lakes. With its chisel-like front teeth and waddling gait, the 45-pound mammal might look clumsy on land, but its sleek shape and muscular tail make it a graceful swimmer that can double the average human's best freestyle pace. Look for the resourceful beaver from coast to coast, up to treeline, in waterways surrounded by deciduous trees.

Humans would need flippers, goggles, earplugs, nose plugs, and a wetsuit to approach a beaver's underwater aptitude.

Eyes, ears, nose A beaver's nostrils and ears shut to form watertight seals, while clear eyelid membranes allow the animal to see while traveling underwater.

Mouth Lips close behind the front teeth, enabling beavers to carry sticks while swimming.

Hind feet Powerful webbed feet propel beavers through the water.

Coat Thick, water-resistant fur insulates in icy ponds.

Tail The scaly black tail serves as a rudder, moving slowly back and forth to steer. On shore, beavers slap their tails against the water's surface at signs of danger, issuing a gunshotlike warning.

Beaver Watching
Fresh mud on dams and lodges, gnawed trees, and well-worn trails to favorite groves indicate an active colony. Scope the site in the late afternoon and early evening, when beavers–which usually become active at dusk–start to come out. As the autumn gets cooler, they often emerge during the last few hours of daylight to stockpile food and winterize the lodge. "It's almost as if they feel the pressure of winter is coming on them," says Douglas Smith, a Yellowstone biologist who has studied beavers for more than a decade. Beaver hotspots include Voyageurs National Park (MN), Rocky Mountain National Park (CO), and the Adirondacks (NY).

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Oct 23, 2008

I had the pleasant surprise of sighting a group of 5-7 beavers while paddling on a canoe trail in Lousiana's Lake Fausse Pointe State Park. As soon as they spotted me, half continued swimming across the waterway while the other half bolted back in the direction they came from. Lake Fausse Pointe State Park is located in the Atchafalaya Basin, and it--as well as several nearby U.S. Army Corps of Engineer water trails--provide convenient "back country" entre to some of the South's most distinct flora and fauna.


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