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Skull of a mountain beaver. Mountain beavers are usually dark gray or brown, but their fur can range from slightly more reddish (rufa) to more blackish depending on subspecies, with a light patch under each ear. The animals have distinctively short tails. Adults weigh about 500–900 g (18–32 oz), with a few specimens topping 1,000 g (35 oz).
Sciuromorpha (/ s ɪ ˈ j uː r ə m ɔː r f ə / 'squirrel-like') is a rodent clade that includes several rodent families. It includes all members of the Sciuridae (the squirrel family) as well as the mountain beaver species.
There are fossils from the Oligocene until Miocene in Asia, from Oligocene in Europe and from the Oligocene until the present in North America, where there is the only living species: the mountain beaver (Aplodontia rufa).
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 beaver (Castor canadensis) is one of two extant beaver species, along with the Eurasian beaver (Castor fiber). [23] It is native to North America and has been introduced in South America and Europe (primarily Finland and Karelia).
The parachuting beavers have become an Idaho icon, and the project represents a pivotal shift in how the animals were managed, experts said. It’s been 75 years since Idaho parachuted beavers ...
Rocky Mountain elk White-tailed deer Pronghorn Plains bison Bighorn sheep. The even-toed ungulates are ungulates whose weight is borne about equally by the third and fourth toes, rather than mostly or entirely by the third as in perissodactyls. There are about 220 artiodactyl species, including many that are of great economic importance to humans.
A 13,600-year-old mastodon skull was uncovered in an Iowa creek, state officials announced this week. Iowa's Office of the State Archaeologist said in a social media post that archaeologists found ...
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