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  • All fields: platyrhynchos
(83 results)



Display: 20

    • Waterfowl management handbook

    • Wildlife management; Waterfowl; Work of the Service; Wildlife refuges; Wildlife impacts;
    • Waterfowl nutritional needs during the annual cycle and the nutritional values of natural foods and crops are discussed.
    • Mallards

    • Birds; Aquatic birds; Wildlife refuges;
    • Female mallard ducks at John Heinz National Wildlife Refuge, PA.
    • Mallards

    • Aquatic birds;
    • Two mallard ducks at John Heinz National Wildlife Refuge, PA.
    • Mallards

    • Birds; Wildlife refuges;
    • Mallard ducks in flight at John Heinz National Wildlife Refuge, Philadelphia, PA.
    • Mallard departing Kanuti River

    • Kanuti National Wildlife Refuge; Recreation; Tourism; Landscapes; Wildlife viewing; Birding; Waterfowl; Rivers and streams; Scenics;
    • 2006
    • Mallard on Kanuti River

    • Kanuti National Wildlife Refuge; Recreation; Tourism; Landscapes; Wildlife viewing; Tundra; Rivers and streams; Scenics; Photography; birding; duck. Water fowl
    • August, 2006
    • Mallard on Kanuti River

    • Kanuti National Wildlife Refuge; Recreation; Tourism; Landscapes; Wildlife viewing; Rivers and streams; Scenics; Waterfowl; ducks
    • August 2006
    • Mallard Female

    • Birds; Waterfowl; Yukon Delta National Wildlife Refuge; YUDE; Alaska
    •  
    • Mallards

    • Karney; Waterfowl; Duck; Ducks; Drake
    •  
    • Mallard ducks in a Wetland

    • animals; aves; Birds; Birds; duck;ducks;Waterfowl; New Jersey
    • Adult male in alternate plumage is unmistakable. Females, immature and eclipse-plumage males could be confused with Black Ducks, Gadwalls and Mottled Ducks, but note the blue speculum with white borders on both sides. Gadwalls are also distinctive...
    • Mallard Drake

    • Birds; Waterfowl; Ducks; Donna Dewhurst Collection; Alaska
    • This image was taken at Westchester Lagoon, Anchorage, Alaska.
    • Mallards

    • Birds; Waterfowl; Ducks; Donna Dewhurst Collection; Alaska
    • This image was taken at Westchester Lagoon, Anchorage, Alaska.
    • Measuring mallard eggs

    • Environmental Sciences; Pollutants;Waterfowl;
    • Fish and Wildlife Service worker measuring mallard eggs for study. Vertical.
    • American Waterfowl B-Roll

    • videography; U.S. Fish and Wildlife Service; waterfowl; birds
    • HD B-Roll Stock Footage. Produced by the National Conservation Training Center (NCTC) videographers. Click on "Text" tab above for additional description on video.
    • Lead hazards to fish, wildlife, and invertebrates: a synoptic reivew

    • Biologists (USFWS); Water; Fishes; Pollutants;
    • Lead (Pb) and its compounds have been known to man for about 7,000 years, and Pb poisoning has been recognized for at least 2,500 years. All credible evidence indicates that Pb is neither essential nor beneficial to living organisms, and that all...

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