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Skulls of a European (left) and North American (right) beaver. Although North American beavers are superficially similar to the European beaver (Castor fiber), several important differences exist between the two species. North American beavers tend to be slightly smaller, with smaller, more rounded heads; shorter, wider muzzles; thicker, longer ...
C. ohioensis skull cast (right), compared to a North American beaver skull (left). The former is a cast of a specimen from Shelby County, Iowa. At the AMNH. Castoroides species were much larger than modern beavers. Their average length was approximately 1.9 m (6.2 ft), and they could grow as large as 2.2 m (7.2 ft).
There are two extant species: the North American beaver (Castor canadensis) and the Eurasian beaver (C. fiber). The Eurasian beaver is slightly longer and has a more lengthened skull, triangular nasal cavities (as opposed to the square ones of the North American species), a lighter fur color, and a narrower tail. [11]
The mountain beaver (Aplodontia rufa) [Note 1] is a North American rodent.It is the only living member of its genus, Aplodontia, and family, Aplodontiidae. [2] It should not be confused with true North American and Eurasian beavers, to which it is not closely related; [3] the mountain beaver is instead more closely related to squirrels, although its less-efficient renal system was thought to ...
North American beavers (Castor canadensis) are the largest rodent species in the United States and the second largest in the world. They have stocky bodies, weigh between 35 and 65 pounds, and are ...
Skull of a beaver. Castoridae is a family of rodents that contains the two living species of beavers and their fossil relatives. A formerly diverse group, only a single genus is extant today, Castor. Two other genera of "giant beavers", Castoroides and Trogontherium, became extinct in the Late Pleistocene.
The North American beavers arrived to Wonders of Wildlife in December. They were relocated to the aquarium from a facility in Minnesota. Wonders of Wildlife seeks community feedback on naming two ...
Sep. 20—The first breath of fall arrived Friday, and with it J.B. McCrummen's Rochester property came alive. Over a dozen raincoat-clad heads, a northern flicker let out a call, flashing its ...