Mockingbird
Natural History Museum, London/science Photo Library
Greater Flamingo #1
Natural History Museum, London/science Photo Library
Dodo Model #2
Natural History Museum, London/science Photo Library
Arctic Tern
Natural History Museum, London/science Photo Library
American White Pelican
Natural History Museum, London/science Photo Library
Killdeer Chick
Manuel Presti/science Photo Library
Northern Cardinal Birds
Natural History Museum, London/science Photo Library
Blue-footed Booby
Daniel Sambraus
Elephant Bird Egg Fragments
Sinclair Stammers/science Photo Library
Thick-billed Murre
Natural History Museum, London/science Photo Library
Antique Bird Egg Collection
Cordelia Molloy/science Photo Library
Common swift, 19th century
Science Photo Library
Male European Goldfinch On A Branch
Colin Varndell
Tricoloured Heron
Natural History Museum, London/science Photo Library
Green Heron
Natural History Museum, London/science Photo Library
Northern Mockingbirds
Natural History Museum, London/science Photo Library
Mute Swan #1
John Devries/science Photo Library
Trumpter Swan
Natural History Museum, London/science Photo Library
Female And Male Mandarin Ducks
John Devries/science Photo Library
Spur-winged Lapwing Vanellus Spinosus #1
Photostock-israel
Fiery-throated And Magnificant Hummingbirds Feeding
Dr P. Marazzi/science Photo Library
White Storks Courting
Bildagentur-online/mcphoto-rolfes
Carolina Chickadee
Natural History Museum, London/science Photo Library
Gentoo Penguins #1
Steve Allen/science Photo Library
Ring Billed Gull
John Devries/science Photo Library
Merlin Perched And Prey
John Devries/science Photo Library
Fiery-throated Hummingbirds
Natural History Museum, London/science Photo Library
Audubon's Shearwater
Natural History Museum, London/science Photo Library
Canada Goose
Natural History Museum, London/science Photo Library
Reddish Egret
Natural History Museum, London/science Photo Library
European Robin #3
Natural History Museum, London/science Photo Library
Elephant Bird Attack
Science Photo Library
Lilac-breasted Roller
Tony Camacho
Indian Roller
Natural History Museum, London/science Photo Library
Sedge Wren
Natural History Museum, London/science Photo Library
Chestnut-headed Bee-eater
Natural History Museum, London/science Photo Library
Elephant Birds
Jaime Chirinos/science Photo Library
Tundra Swan
Natural History Museum, London/science Photo Library
White-bellied Sea Eagle
Bildagentur-online/mcphoto-schulz
Budgerigars Flocking To Find Water #22
Paul Williams/science Photo Library
House Sparrow Drinking Water #1
Simon Booth
Giant Moa
Jaime Chirinos/science Photo Library
Common Redshank
Luis Montanya/marta Montanya/science Photo Library
Common Hoopoe
Natural History Museum, London/science Photo Library
American Widgeon
Natural History Museum, London/science Photo Library
American Kestrels
Natural History Museum, London/science Photo Library
Black-crowned Night Heron
Natural History Museum, London/science Photo Library
Finches And Tanagers
Natural History Museum, London/science Photo Library
Peacock Feather #1
Science Photo Library
Hanging Parrot
Natural History Museum, London
Barnacle Geese Flying
Patrick Landmann/science Photo Library
Large Hawk-cuckoo
Natural History Museum, London/science Photo Library
Turkey Vultures
Christopher Swann/science Photo Library
Male American Robin
Maria Mosolova/science Photo Library
Pine Siskin
Natural History Museum, London/science Photo Library
Saltmarsh Sharp-tailed Sparrow
Natural History Museum, London/science Photo Library
Kingfisher Feathers
John Devries/science Photo Library
Birds-of-paradise
Natural History Museum, London/science Photo Library
House Wren
Natural History Museum, London/science Photo Library
Ashy Wood-swallow
Natural History Museum, London/science Photo Library
Estrildid Finches #3
Natural History Museum, London/science Photo Library
Common Kestrel On A Branch #1
John Devries/science Photo Library
Pheasant #2
Duncan Shaw/science Photo Library
European Goldfinch #5
John Devries/science Photo Library
Group Of Auks And Auklets
Natural History Museum, London/science Photo Library
Kingfisher Wing Feathers
John Devries/science Photo Library
African Elephant Feeding Alongside Egrets
Tony Camacho
Barn Owl
Simon Booth/science Photo Library
Blue Cranes
Peter Chadwick
Alpine Chough
Martin Rietze
Male Eurasian Bullfinch
Colin Varndell