California golden beaver

The California golden beaver (Castor Canadensis Subauratus) is a subspecies of the North American beaver native to Northern and Central California. Like the Southern sea otter, the California golden beaver is considered to be a keystone species to California. Beavers in California are now commonly found in Sierra Nevada. Wolves are considered to be a keystone species to Yellowstone national park and other places in the US like the Eurasian beaver is considered to be a keystone species to Scotland.