Waterfowl of Washington. Species Identification, by The Washington Department of Fish and Wildlife

New southwest - Washington Department of Fish & Wildlife

Western Washington Birders

5 tips to get started waterfowl hunting in Washington, by The Washington Department of Fish and Wildlife

Waterfowl of Washington. Species Identification, by The Washington Department of Fish and Wildlife

Data and Ducks: Developing and compiling transboundary avian data for sea ducks in the Salish Sea - Pacific Birds Habitat Joint Venture

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Hunting the Northwest Goose Permit Zone

The Project Gutenberg eBook of Ducks at a Distance, by Robert W. Hines

Barrow's goldeneye Washington Department of Fish & Wildlife, golden eye

27 Types of Ducks Found in Washington! (state) - Bird Watching HQ

Mallard - Wikipedia

Bufflehead Missouri Department of Conservation

Waterfowl Missouri Department of Conservation