Canada geese, mallards, wigeons and pintails, with lesser numbers of tundra swans, now geese and green-winged teals. The river islands support large nesting colonies of ring-billed and California gulls. Checklist 1,763 acres of brushy creek bottoms, wet meadows, sagebrush uplands and croplands located along Toppenish Creek. Numerous nesting waterfowl. Raptors and marsh birds includ eagles, hawks, herons, gulls, egrets and terns.
Migration stop for large concentrations of shore birds.
Resting and feeding area fo up to 30,000 migrating waterfowl. Checklist 15,565 acres of lakes and marshes interspersed with ponderosa pine. Up to 50,000 ducks, geese and other migratory birds seen in fall. Principal nesting species are redheads and other diving ducks. Checklist 2,817 acres of estuaries, tidal flats, freshwater marshes, dikes and grasslands.