During the mid-1800s, the Mill River that flows through Williamsburg and Northampton powered more than three dozen mills, transforming the local economy and the history of Northampton in many important ways (e.g. the creation of villages, the arrival of immigrants to work in the mills, new inventions in manufacturing). Nowadays, however, most of us hardly notice the Mill River as we "sail" over its small bridges in our cars. The same cannot be said for local wildlife, which frequently cross the