Located in northwest Snohomish County, this IBA comprises the northeast portion of Port Susan Bay, the mudflats of Livingston Bay, the Stillaguamish River Delta, and the surrounding farm fields. The extensive intertidal area consists of shallow water, with a shoreline characterized by tidally influenced mudflats and sloughs. The adjoining agricultural fields are flat and diked, and are well known feeding areas for Snow Geese and swans. Most of the upland area is privately owned, and is not accessible to the public, but a portion of it is in state ownership and is managed for hunting and wildlife-oriented recreation by WDFW.

Ornithological Summary

This area contains extensive estuaries and tidal mudflats, providing critical habitat for large numbers of shorebirds, mostly Western Sandpipers and Dunlin, both in winter and during spring and fall migrations. It is one of only four sites in Puget Sound that regularly supports more than 20,000 shorebirds in a season. Large flocks of wintering ducks, primarily Northern Pintail, Mallard, American Wigeon and Green-winged Teal, use the estuarine sloughs and sheltered shallow waters. In winter, Trumpeter and Tundra Swans and large numbers of Snow Geese forage along the shoreline and also in the farm fields of the floodplain. Many raptor species frequent the tidal areas, marshy grasslands, and farm fields; up to 16 species have been recorded on this site. The hedgerows and fields of this area provide important wintering habitat for sparrows.


Private, state, city.


Habitats Estuarine, agricultural, salt marsh, riparian

Land Use

Land Use Agriculture, wildlife conservation, residential

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