The Sonny Bono Salton Sea NWR has 826 acres of manageable wetland units, which are managed for resident and migratory bird species such as waterfowl, shorebirds and wading birds. In addition, specified impoundments are managed as permanent wetlands to provide critical nesting and year-round habitat for the endangered Yuma clapper rail. Refuge wetlands provide nesting habitat for a variety of other species, including the least bittern, white-faced ibis, black-necked stilt and American avocet. All wetlands are flooded from water supplied by the Imperial Irrigation District. This water is termed “class 1” irrigation water, which is free of fertilizers, toxic pesticides and high levels of salts that are common in agricultural drain water.
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