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Klamath Basin NWRC Sonny Bono Salton Sea Cibola NWR (Southwest Region) Cochella Valley NWR San Diego NWR Sweetwater Marsh NWR Tijuana Slough NWR Seal Beach NWR Imperial NWR (Southwest Region) Havasu NWR (Southwest Region) Hopper Mountain Bitter Creek NWR Kern NWR Blue Ridge NWR Salinas River NWR Grasslands NWR Merced NWR San Luis NWR Don Edwards San Francisco Bay San Joaquin River NWR Farallon NWR Marlin Islands NWR Stone Lakes NWR Colusa NWR Sutter NWR Butte Sink NWR Delevan NWR Willow Creek - Lurline NWR Sacramento River NWR Humboldt Bay NWR Tule Lake NWR Modoc NWR Clear Lake NWR Lower Klamath NWR