The watershed is located near the convergence of the Atlantic Coast and Mississippi River flyways, major routes for songbirds and waterfowl migrating from northeastern U.S. and Canada to the Gulf of Mexico. This location, combined with the sheer diversity of habitats that include wetlands, streams, lakes, meadows and forested regions, creates ample, year-round birding opportunities. Cussewago Bottom, Hemlock Hill Research Area, Erie National Wildlife Refuge and Conneaut Marsh are designated Important Bird Areas by the Audubon Society.