Description | Description:Beavers are brown or grey nocturnal animals which build dams in rivers, using sticks, leaves, and mud. They are great in the water, but slow on land, and will slap their flat tails on the water as a sign and warning of distress. | Description:Norway rats were once native to brushy areas and forests of China. Through trade, it was introduced to Europe. With the explosion of human population, rats made their way to every home they were able to. They are have brown fur and are sometimes called “brown rats”. |