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Castoroides (Latin: "beaver" (castor), "like" (oides) [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.
In their natural range in North America, bears and wolves prey on the beavers and keep the population under control. One observer noted that anyone considering importing beavers should also import bears, those being the beavers' natural predators. [4] According to a June 2011 NPR report, 200,000 beavers were living in the area. [6]
North American beavers build more open-water lodges than Eurasian beavers. Beaver lodges built by new settlers are typically small and sloppy. More experienced families can build structures with a height of 2 m (6 ft 7 in) and an above-water diameter of 6 m (20 ft).
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.
At 90–113 kilograms (198–249 lb), 40% larger than the living capybara, [1] N. pinckneyi is one of the largest rodent species ever discovered, surpassed only by Josephoartigasia monesi, several species of Phoberomys, and possibly the Pleistocene giant beaver. [2] Remains have been found in southern North America, from Arizona to Florida to ...
Her past research has found that beavers create wildfire refuges: unburned or lightly crisped islands where plants and animals are able to survive amid flames. But there was some question as to ...
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 ...
In 1957, a healthy and relatively pure wood bison herd of 200 was discovered near Nyarling River. In 1965, 23 of these bison were relocated to the south side of Elk Island National Park. Today, they number 300 and are the most genetically pure wood bison remaining.