Antioch Dunes Evening Primrose

Antioch Dunes NWR, Mare Island, California: Located in northeast San Pablo Bay, Antioch Dunes National Wildlife Refuge was the first refuge established for an endangered insect and two endangered plants. The insect is Lange’s metalmark butterfly and the plants are the yellow Contra Costa wallflower and the white Antioch Dunes evening primrose, shown here. Public use is extremely limited. Check at the refuge office for dates and times of guided tours.