The trees that line the Concord River support a wide range of wildlife, including many mammals.  Many mammals prefer to live in an ecotone, the edge between two ecosystems, a space particularly rich with food and shelter.  Raccoons, for example, hunt and gather in forested areas, where they find rodents, insects, and plants to eat.  They also hunt and gather food from along the river, including insects, mollusks, and frogs.  

Raccoons have many different kinds of teeth, which allow for capturing and eating different types of prey as well as crushing and grinding a variety of plants.  This is omnivorous dentition.	The teeth of muskrats are suited for snipping and grinding plant materials.  This is herbaceous dentition.  (Muskrats are herbivores).

 

River otters are well-adapted for hunting at night, in the water and on land, feeding on fish, turtles, and frogs.  They are seldom observed, however, aside from their tracks and slides.