This half-mile long stroll on a gravel trail along the San Francisco Bay is a treat for birders. You will likely see some of the more common residents of the preserve, such as mallard ducks, American avocets, sandpipers, egrets, black-necked stilts, and swallows. Keep your eyes peeled for some of the preserves more unusual birds, such as burrowing owls or the endangered Ridgeway’s rail.