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  • All fields: Bill
(186 results)



Display: 20

    • Walrus

    • Walrus
    • Mammals; Wildlife refuges;
    • Walrus on land at Togiak National Wildlife Refuge
    • Bettles  community

    • Bettles community
    • Villages; Wildlife viewing; Tundra; Rivers and streams;
    • Villages; Communities; Wildlife viewing; Tundra; Rivers and streams;
    • Measuring a Tundra Swan

    • Measuring a Tundra Swan
    • Biology; science; research; Tundra swans; swans; swan; Alaska; Yukon Delta NWR; avian influenza; avian Influenza sampling; AI; Birds flu; Donna Dewhurst Collection
    • USGS Biologist Dan Rizzolo measures the bill length on a tundra swan, prior to banding and avian influenza sampling.
    • Surface Elevation Monitoring

    • Surface Elevation Monitoring
    • Structures; Riparian environments; Rivers and streams; Habitat restoration; Wetland restoration; Wetlands; Wildlife refuges; Biologists (USFWS); Monitoring;
    • USFWS biologist Bill Bridgeland taking measurements on a Surface Elevation Table (SET) installed last year in cooperation with USGS. SETs will allow us to detect changes in the elevation of the marsh surface in response to the marsh restoration as...
    • Piping Plovers

    • Piping Plovers
    • Shorebirds; Coastal environments; Wildlife refuges; Threatened species;
    • Two piping plovers in flight at Monomoy National Wildlife Refuge, Massachusetts.
    • American Oystercatchers

    • American Oystercatchers
    • Shorebirds; Wildlife refuges; Coastal environments;
    • Two American oystercatchers in flight over ocean at Monomoy National Wildlife Refuge, MA.
    • Creek erosion

    • Creek erosion
    • Wildlife refuges; Erosion; Coastal environments;
    • Tidal creek headward erosion into a salt marsh off of Horsehead Creek at Cape Romain National Wildlife Refuge, SC.
    • Northern Shoveler at Santa Ana National Wildlife Refuge

    • Northern Shoveler at Santa Ana National Wildlife Refuge
    • Wildlife Refuges; Waterfowl; Landscape photography;
    • These ducks prefer freshwater lakes, marshes and wetlands with muddy edges.The northern shoveler has the largest bill of any duck in North America. The bill is this bird's most prominent feature, and is longer than its head.
    • Great Egret

    • Great Egret
    • Birds;Wading birds
    • The great egret is a large white heron with a heavey yellow bill that frequents marshes, wetlands and mud flats.
    • Common Tern with Fish

    • Common Tern with Fish
    • Birds; Migratory birds; Marine birds;
    • The common tern is slightly larger and longer-legged than the Arctic Tern and has shorter wings. It has a red bill that is tipped with black. For more information about this species visit http://www.mbr-pwrc.usgs.gov/Infocenter/i0700id.html. ...
    • Common loon

    • Common loon
    • Aquatic birds; Birds;
    • The common loon is best known for its call and is one of the most recognizable wilderness sounds. The loon is a large bird, about 28 to 36 inches, and has a thick, pointed, black bill. In breeding plumage the loon's head and neck are black with...

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