Castoroides (SciiFii)

The giant beaver (Castoroides americanus) is a species of enormous beaver that originally lived in North America during the Pleistocene as two extinct species, C. leiseyorum and C. ohioensis, and was once extinct, but has since been brought back from extinction by SciiFii and reintroduced to the modern swamps, marshlands, and riverbanks across North America to help boost biodiversity. The giant beaver is one of the largest beavers to ever exist, growing on average length of around 1.9 meters (6.2 feet) and weighing about 90 kg (198 lb), but some giant beavers can grow to be about 2.2 meters (7.2 feet) long and weigh around 125 kg (276 lb). The hind feet of the giant beaver are much larger than in smaller beavers, while the hind legs are shorter. The tail is longer and is not paddle-shaped as in smaller beavers, although it can swim efficiently due its larger webbed hind feet. The skull structure of the giant beaver allow it to participate in extended underwater activity, thanks to its ability to take in more oxygen to its lungs. The size of its brain is proportionally smaller. As a result, the giant beaver has inferior interactions in its environment, as well as less complex patterns of thoughts and behavior than its smaller relative. Some giant beavers live in dams made by their smaller relatives, due to the giant beavers inability to make dams, so they depend on the smaller beavers for shelter, and in turn, the giant beavers help the smaller beavers by detering predators more dangerous than what the smaller beavers could handle. The conservation status of the giant beaver is Least Concern thanks to strong conservation efforts and the giant beaver's wide natural range.