Inaki Relanzon / Madagascar Pochard (Aythya innotata) on water. One of the most endangered ducks in the world, rediscovered in 2008. Bemanevika protected area, north Madagascar, Africa.

Robin Chittenden / European pochards (Aythya ferina) on water, Welney WWT, Norfolk, England, January

Wild Wonders of Europe / Varesvuo / European pochard (Aythya ferina) flock in flight, Pusztaszer, Hungary, May 2008

Gabriel Rojo / Rosi-billed pochard pair {Netta peposaca} Argentina

Mike Read / Red crested pochard duck male {Netta ruffina} Arundel, Sussex, UK

Wild Wonders of Europe / Widstrand / European Pochard (Aythya ferina) female taking off from water, Danube delta rewilding area, Romania May

Rod Williams / Rosy-billed pochard (Netta peposaca) male preening on water, Eastern Central Southern USA. Captive

Rod Williams / Rosy-billed pochard (Netta peposaca) on water, Eastern Central Southern USA. Captive.

Ernie Janes / Coot (Fulica atra) attacking a male Pochard duck (Aythya ferina), territorial dispute, UK

David Kjaer / Baer's Pochard (Aythya baeri) male, native to Eastern Asia. Captive, UK.

David Kjaer / Rosybill / Rosy-Billed Pochard (Netta peposaca) male on water, native to South America. Captive, UK.

Bryan and Cherry Alexander / Rosy-billed Pochard, Netta peposaca in Buenos Aires. Argentina, October.

Fabrice Cahez / Common Pochard (Aythya ferina) in flight. Brenne, France, May.

Ernie Janes / Pochard (Aythya ferina) male in flight. Norfolk, UK, April.

Inaki Relanzon / A researcher using a radio receiver to find Madagascar Pochard (Aythya innotata). Bemanevika protected area, north Madagascar, Africa, October 2010.

Inaki Relanzon / Two Madagascar Pochard (Aythya innotata) on water. One of the most endangered ducks in the world, rediscovered in 2008. Bemanevika protected area, north Madagascar, Africa.

Inaki Relanzon / Madagascar Pochard (Aythya innotata) on water. One of the most endangered ducks in the world, rediscovered in 2008. Bemanevika protected area, north Madagascar, Africa.

Edwin Giesbers / Red-crested Pochard (Netta rufina) male taking a bath in water. The Netherlands, June.

Mark Carwardine / Rosybill duck / Rosy billed pochard (Netta peposaca) portrait, Slimbridge, Gloucestershire, UK, Captive, Native of South America, June

Rod Williams / Male Rosy-billed pochard (Netta peposaca) captive, from Central and South America

Andrew Parkinson / Pochard duck (Aythya ferina) male on lake, Nottinghamshire, UK, February. (non-ex)

Rod Williams / Pair of Baer's Pochards (Aythya baeri) with male on right, female on left. Endangered, Captive.

Rod Williams / Rosy-billed Pochard (Netta peposaca) male on water in aggressive posture, in response to a territorial threat. Captive, occurs Central Chile, South America

Rod Williams / Rosy-billed Pochard (Netta peposaca) female in reeds, Central Chile. Captive.

Jasper Doest / Common Pochard (Aythya ferina) drake preening, Friesland, Netherlands

Chris Gomersall / Male Red crested pochard (Netta rufina) on water, Portugal, March

Barry Mansell / Rosy-billed Pochard (Netta peposaca) female on water, South America

Barry Mansell / Rosy-billed Pochard (Netta peposaca) male on water, South America

Michel Poinsignon / Red-crested pochard {Netta rufina} male on water, captive, Zoo d'Amnéville, Lorraine, France

Michel Poinsignon / Red-crested pochard {Netta rufina} female on water, captive, Zoo d'Amnéville, Lorraine, France

Alan Williams / Whooper swan (Cygnus cygnus) landing close to Pochard, Welney WWT, Norfolk, UK, February

Paul Hobson / Red crested pochard (Netta rufina) on water, Camargue, France

Alan Williams / Red crested pochard (Netta rufina) male on water, feral bird, introduced species, Norfolk, UK, March

Alan Williams / Red crested pochard (Netta rufina) male on water, feral bird, introduced species, Norfolk, UK, March

Alan Williams / Red crested pochard (Netta rufina) male on water, feral bird, introduced species, Norfolk, UK, March

Alan Williams / Red crested pochard (Netta rufina) male on water, feral bird, introduced species, Norfolk, UK, March

Alan Williams / Red crested pochard (Netta rufina) male calling on water, feral bird, introduced species, Norfolk, UK, March

Alan Williams / European pochard (Aythya ferina) male in flight, Norfolk, UK, February

Alan Williams / European pochard (Aythya ferina) male in flight over water, Welney WWT reserve, Norfolk, UK, January

Alan Williams / European pochard (Aythya ferina) male on choppy water, Welney WWT reserve, Norfolk, UK, January

Alan Williams / European pochard (Aythya ferina) male flapping wings on water, Welney WWT reserve, Norfolk, UK, January

Alan Williams / Red crested pochard (Netta rufina) male on water with crest up, feral bird, introduced species, Norfolk, UK, March

Alan Williams / Red crested pochard (Netta rufina) male in flight, feral bird, introduced species, Norfolk, UK, March

Alan Williams / Red crested pochard (Netta rufina) male taking off from water, feral bird, introduced species, Norfolk, UK, March

Alan Williams / Red crested pochard (Netta rufina) male bathing, feral bird, introduced species, Norfolk, UK, March

Alan Williams / Red crested pochard (Netta rufina) male in flight over water, feral bird, introduced species, Norfolk, UK, March

Alan Williams / Red crested pochard (Netta rufina) male in flight over water, feral bird, introduced species, Norfolk, UK, March

Alan Williams / Red crested pochard (Netta rufina) male flapping wings on water, feral bird, introduced species, Norfolk, UK, March

Kim Taylor / Red crested pochard (Netta rufina) drake, captive, Sussex, England

Wild Wonders of Europe / Varesvuo / European pochard (Aythya ferina) flock in flight over wetlands, Pusztaszer, Hungary, May 2008

Dietmar Nill / Red-crested Pochard (Netta rufina) pair on water, Bavaria, Germany

Paul Hobson / European pochard {Aythya ferina} female taking off from water, Gloucester, UK

Graham Eaton / Male Pochard (Aythya ferina) UK 2007

Graham Eaton / Red crested Pochard (Netta rufina) with head tucked under wing, UK, 2007. Captive bird.

Graham Eaton / Red crested Pochard (Netta rufina) with head tucked under wing, UK, 2007. Captive bird.

Graham Eaton / Male European pochard (Aythya ferina) about to dive for food, UK, 2007. Photographed on land where wild and captive birds coexist.

Steve Knell / European pochard duck {Aythea ferina} male taking off, UK 2006

Graham Eaton / European Pochard (Aythya ferina) feeding, Martin Mere, Lancashire, UK. Photographed on land where wild and captive birds coexist.

Roger Powell / Red-crested Pochard (Netta rufina) Female calling, Tyne and Wear, UK

Roger Powell / Red-crested Pochard (Netta rufina) drakes, Tyne and Wear, UK

Rod Williams / Baer's pochard, male (Aythya baeri) native to Siberia and China, Captive

Rolf Nussbaumer / Pair of Red-crested Pochard (Netta ruffina) on water, Luzern, Switzerland. April 1995

Rolf Nussbaumer / Male Red-crested Pochard (Netta ruffina) on water Luzern, Switzerland. April 1995

David Kjaer / Red-crested Pochard duck (Netta ruffina) on water, captive UK

David Kjaer / Two male (drakes) European Pochards (Aythya ferina) taking off from water, Gloucestershire UK

Rod Williams / Red crested pochard {Netta ruffina} male, captive, from Eastern europe and Asia

Hanne & Jens Eriksen / Red crested pochard, male {Netta ruffina} Switzerland

Konrad Wothe / Red-crested Pochard (Netta rufina) male and Narcissus flowers, Germany

John Downer / European pochard duck (Aythya ferina) male in water, UK

Russell Cooper / European pochard duck (Aythya ferina) female in water, UK

George McCarthy / European Pochard {Aythya ferina} male, Sussex, UK

George McCarthy / European pochard {Aythya ferina} female, Sussex, UK

Jean E. Roche / European pochard {Aythya ferina} nest in tree stump with six eggs, France

Chris Gomersall / European Pochard {Aythya ferina} male, UK

Chris O'Reilly / Red crested pochard {Netta ruffina} male, Scotland, UK

Russell Cooper / European pochard (Aythya ferina) male resting on water, UK

Russell Cooper / Male European pochard (Aythya ferina) portrait in water, UK

DAVID TIPLING / European pochard drake (Aythya ferina) on water, Sussex, UK

Jean E. Roche / Trail of sunlight reflected on water at sunset with raft of roosting European pochard duck, Camargue, France

Jose B. Ruiz / Male Red crested pochard duck {Netta ruffina} shedding plumage, Spain.

Jose B. Ruiz / Male European pochard duck {Aythya ferina} Spain.

Philippe Clement / Red crested pochard male {Netta ruffina} Belgium

Philippe Clement / European pochard male {Aytha ferina} Belgium

Colin Seddon / Red crested pochard male on water {Netta ruffina} Gloucestershire, UK.

Barry Mansell / Red crested pochard {Netta ruffina} Arizona, USA.

WILLIAM OSBORN / Red crested pochard male on water with crest raised {Netta ruffina} UK

WILLIAM OSBORN / Red crested pochard female on water {Netta ruffina} UK

Gabriel Rojo / Rosi-billed pochard duck pair {Netta peposaca} + Coot. La Pampa, Argentina

Gabriel Rojo / Rosi-billed pochard {Netta peposaca} Macachin, La Pampa, Argentina

Paul Hobson / Whooper swan {Cygnus cygnus} with Pochard on water Norfolk, UK

GEORGETTE DOUWMA / Rosy billed pochard {Netta peposaca} Regents Park, London, UK, occurrs South America

Steve Knell / Flock of male European pochards {Aythya ferina} + one male Mallard. UK. 'Odd one out'

Paul Hobson / Flock of European pochards on water, Norfolk England UK

Paul Hobson / European Pochard female. England, UK

Paul Hobson / European Pochard male, England, UK

DAVID TIPLING / Red crested pochard {Netta ruffina} duckling on water, UK