Over 200 species of birds appear in the California Delta throughout the year. Namely: Great Blue heron, Snowy egrets, pelicans, Sandhill cranes, geese, swans, and hawks. Ducks and pheasants are among the waterfowl that can be hunted on portions of the California Delta.
Antioch Dunes National Wildlife Refuge - Found along the southern shore of the San Joaquin River in the San Francisco Bay area of the Delta. The refuge was established in 1980, the refuge provides protection for three endangered species: Lange's Metalmark butterfly, Antioch Dunes evening primrose and Contra Costa wallflower. The refuge and a few acres of surrounding lands contain most of the remaining habitat for these three species and are all that remain of a nine kilometer stretch of sand dunes formed during glacial periods. Isolation of this sand dune habitat resulted in the development of a unique assemblage of plants, insects, and reptiles. Due to the sensitivity of the habitats and the endangered species, the refuge is not open to unsupervised use by the public, but staff and local educators conduct tours and events.