“Beavers” National Geographic: Beaver beaver beaver fifteen minutes underwater beaver fifteen minutes underwater building dams National Geographic Beavers beaver family “Beavers” this map at National Geographic beavers Beavers building dams http://en.wikipedia.org/wiki/Beaver beavers maintain monogamous relationships with their mates http://en.wikipedia.org/wiki/Beaver American beaver beaver Beavers “Beavers” never overweight members of the rodent family