Male Long-tailed Duck
John Devries/science Photo Library
Female Scaly-sided Merganser
John Devries/science Photo Library
Male Scaly-sided Merganser
John Devries/science Photo Library
Common Shelduck
Natural History Museum, London
Scaly-sided Mergansers Splashing Water
John Devries/science Photo Library
Harlequin Duck
John Devries/science Photo Library
Australian Wood Ducks
Dr P. Marazzi/science Photo Library
Harlequin Duck Pair
John Devries/science Photo Library
Mute Swan #1
John Devries/science Photo Library
Crested Duck
Natural History Museum, London
Male Mallards Fighting
Bildagentur-online/mcphoto-rolfes
Red-billed Duck
Natural History Museum, London
Hooded Merganser Male
Colin Varndell/science Photo Library
Goose Down Feather Barb And Barbule Tips #3
Dennis Kunkel Microscopy/science Photo Library
Mallard Duck
Heath Mcdonald/science Photo Library
Male Cape Shoveler
Peter Chadwick/science Photo Library
Domestic Duck Gizzard
Nigel Downer/science Photo Library
Mandarin Duck
Heath Mcdonald/science Photo Library
Cape Teal
Natural History Museum, London
Yellow-billed Duck
Natural History Museum, London
South African Shelduck
Natural History Museum, London
Male Mallard Landing On Water
Bildagentur-online/mcphoto-rolfes
Yellow-billed Pintail
Natural History Museum, London
New Zealand Scaup
Natural History Museum, London
Male Goldeneye Duck In Breeding Plumage
Brian Gadsby/science Photo Library
Duck Diving
Colin Cuthbert/science Photo Library
Goose Down Feather Barb And Barbule Tips #2
Dennis Kunkel Microscopy/science Photo Library
Mallard Drake
John Devries/science Photo Library
Male Smew
Brian Gadsby/science Photo Library
Mallard Drake Walking On Ice
John Devries/science Photo Library
Canada Goose #4
John Devries/science Photo Library
Goose Down Feather Barbules And Tips #3
Dennis Kunkel Microscopy/science Photo Library
Andean Goose
Library Of Congress, Rare Book And Special Collections Division/science Photo Library
Mandarin Duck #1
Heath Mcdonald/science Photo Library
Male Common Shelduck
Bob Gibbons/science Photo Library
Cape Teal
Bob Gibbons/science Photo Library
Dendrocygna Arcuata Australia Eggs
Natural History Museum, London
Steamer Duck Skull
Ucl, Grant Museum Of Zoology
Kelp Goose
Natural History Museum, London
Greylag Goose In Flight
Bildagentur-online/mcphoto-rolfes
Paradise Shelduck
Natural History Museum, London
Whistling Duck
Natural History Museum, London
Goose Down Feather Barb And Barbule Tips
Dennis Kunkel Microscopy/science Photo Library
Goose Down Feather Barbules And Tips
Dennis Kunkel Microscopy/science Photo Library
Goose Down Feather Barb And Barbule Tips #1
Dennis Kunkel Microscopy/science Photo Library
Egyptian Goose #1
Gustoimages/science Photo Library
Canadian Goose
Dennis Kunkel Microscopy/science Photo Library
Fulvous Whistling Duck
Peter Chadwick/science Photo Library
Goose Down Feather Barbules And Tips #1
Dennis Kunkel Microscopy/science Photo Library
Goose Down Feather Barbules And Tips #2
Dennis Kunkel Microscopy/science Photo Library
Egyptian Goose
Photostock-israel/science Photo Library
Bird Internal Anatomy
Claus Lunau/science Photo Library
Male White-headed Duck Juvenile
John Devries/science Photo Library
Mandarin Duck #2
Heath Mcdonald/science Photo Library
Pacific Black Duck
Natural History Museum, London
Mallards Mating
Bildagentur-online/mcphoto-rolfes
White-faced Whistling Duck
Peter Chadwick
Fulvous Whistling Duck
Peter Chadwick
Pochard Duck
Denise Swanson