Napa County’s watersheds not only provide a home to over 140,000 people, they also support abundant wildlife, several of which are recognized as rare, threatened, or endangered.

Napa County is one of the most biologically diverse counties in the San Francisco Bay Area. Located at the margins of three major biological regions (the northern reaches of the San Francisco Bay-Delta estuary, the western edge of the Sacramento Valley, and divided north-to-south by several extensions of the Coast Range), the county exhibits a uniquely high level of wildlife diversity.

The forests, woodlands, shrublands, grasslands, rock outcrops, riparian corridors, wetlands, and vernal pools in our watersheds provide habitat for a variety of birds, mammals, reptiles, amphibians, and invertebrates. Napa County is also located along the Pacific Flyway, a bird migration route that extends from Mexico to Canada. 


Three major, regional north-south wildlife movement routes have been identified in Napa County: the Western Mountains, the Napa River, and the Blue Ridge-Berryessa Natural Area. Maintenance of wildlife movement areas is important to conserve the diversity of wildlife and plants within Napa County.