The beaver (genus Castor) is a large, primarily nocturnal, semiaquatic rodent. Castor includes .. Still, adults do the majority of the work and young beavers help their parents for reasons based on natural selection rather than kin selection .
The phrase "busy as a beaver" aptly describes these big-toothed rodents One lodge is often the home for a monogamous couple, their young.
Adults can be up to four feet long and weigh over 60 pounds. The beaver has Both the male and the female take care of the young beavers. They stay with.