The North American Beaver (Castor canadensis), also called the American beaver or Canadian beaver, is one of two extant beaver species, the other being the Eurasian beaver (Castor fiber). It is native to North America and introduced in South America (Patagonia) and Europe (primarily Finland and Karelia). In the United States and Canada, the species is often referred to simply as "beaver", though this causes some confusion because its range overlaps with another distantly related rodent, the moun