From the Water Education Foundation – The Cosumnes River is said to be the last free-flowing river from the Sierra Nevada to the Central Valley, and offers visitors a chance to peek at what the Central Valley once looked like. The preserve is home to more than 250 bird species, more than 40 fish species, and 230 plant species, including small but significant stands of valley oaks that were once ubiquitous across the Central Valley. Birds that migrate throughout the Pacific Flyway make the preserve a stop on their journey. (more)