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Castoroides (from Latin castor (beaver) and -oides (like) [2]), or the giant beaver, is an extinct genus of enormous, bear-sized beavers that lived in North America during the Pleistocene. Two species are currently recognized, C. dilophidus in the Southeastern United States and C. ohioensis in most of North America.
A beaver's lips can close behind the incisors, preventing water from entering their mouths as they cut and bite onto things while submerged. [30] [31] The fore foot, hind foot, and tail of a beaver Beaver tail and footprints on snow. The beaver's front feet are dexterous, allowing them to grasp and manipulate objects and food, as well as dig.
The surface of beaver ponds is typically at or near bank-full, so even small increases in stream flows cause the pond to overflow its banks. Thus, high stream flows spread water and nutrients beyond the stream banks to wide riparian zones when beaver dams are present. Finally, beaver ponds may serve as critical firebreaks in fire-prone areas. [59]
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A beaver is featured prominently on the stamp and seal issued to Professional Engineers and Geoscientists by APEGA. It also appears on the back on the state flag of Oregon. The beaver also appears in the coats of arms of the Hudson's Bay Company, [108] University of Toronto, Wilfrid Laurier University, and the London School of Economics.
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The largest known beaver dam is in Wood Buffalo National Park in Alberta, Canada, and is 775 metres (2,543 ft) long. [10] Satellite photos provided by NASA WorldWind show the dam did not exist in 1975, but it appeared in subsequent images. It has two or more lodges and is a combination of two original dams.
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