How Smart are Beavers?

Clark, Neil M.
January 1947
Saturday Evening Post;1/18/1947, Vol. 219 Issue 29, p24
The article discusses the behavior of beavers and several studies about this animal in the U.S. Beaver is a big water rat with long teeth and ping-pong bat-like tail, and are usually shy and hard to see. The animal gnaws and falls down trees to build dams in rivers. A study in Michigan revealed that beavers damage trout streams by slowing them up, but a study from Utah refuted it. The Utah researchers found that beavers' engineering operations improve trout streams by stabilizing stream flow.


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