Nick Saunders/ BIA / Ruddy Duck (Oxyura jamaicensis) male in courtship display, Saskatchewan, Canada
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Alan Murphy / Ruddy Duck (Oxyura jamaicensis) male in courtship display, British Columbia, Canada
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Alan Williams / Male Ruddy Duck (Oxyura jamaicensis) displaying on lake expelling air from breast feathers to form bubbles (captive bird) UK, May 2010
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Gerrit Vyn / Ruddy Duck (Oxyura jamaicensis) male in breeding plumage performing a "bubbling display"which is used in both courtship and aggressive territorial encounters. The male holds its head and tail and 2 ro...
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Charlie Summers / Ruddy duck (Oxyura jamaicensis) female rolling on her side as she preens. Image taken on an Arapaho National Wildlife Refuge pond in North Park, Colorado.
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Charlie Summers / Ruddy duck (Oxyura jamaicensis) drake making bubbles in courtship behaviour, Arapaho National Wildlife Refuge pond, North Park, Colorado.
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Dong Lei / Ruddy Shelduck (Tadorna ferruginea) Mt Shishapangma, Mt Qomolangma National Park, Qinghai Tibet Plateau, China.
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John Shaw / Ruddy duck (Oxyura jamaicensis) in a small marsh pond, doing courtship display where it beats its breast with bill to create bubbles. British Columbia, Canada. June.
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John Chan / Male Ruddy duck (Oxyura jamaicensis) in winter plumage diving to feed on aquatic plants and insects, Bolsa Chica Ecological Reserve, California, USA, December.
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Gabriel Rojo / Lake duck, (Oxyura vittata), La Pampa, Patagonia
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Gabriel Rojo / Lake duck, (Oxyura vittata), La Pampa, Patagonia
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Gabriel Rojo / Lake duck, (Oxyura vittata) group of male and females, La Pampa, Patagonia