The beaver is a large, primarily nocturnal, semiaquatic rodent. Beavers are known for building dams, canals, and lodges. They are the second-largest rodent in the world after the capybara. Their colonies create one or more dams to provide still, deep water to protect against predators, and to float food and building material.
- Skull Length 9.7 cm (3.8 in.)
- Skull Width 7 cm (2.8 in.)
- Skull Height 7.5 cm (3 in.)