Important Bird Areas

Walla Walla River Delta

Washington

Ornithological Summary

This site is a combination of open water and deep silt mudflats with associated marshes and riparian areas. Cottonwoods, willows, and cattails are the dominant vegetation. The IBA is located just north of the Wallula Gap, which is considered a flight corridor for many migratory birds. The delta supports large numbers of pelicans, waterfowl, shorebirds, and gulls, particularly Northern Pintails, Canvasbacks, and Western Sandpipers. The site also supports an extraordinarily high population of Vaux's Swifts during fall migration.