Mark Carwardine / Adult male Northern pintail duck (Anas acuta) flying, Bosque del Apache National Wildlife Refuge, New Mexico, USA

David Kjaer / Pair of Northern pintail ducks (Anas acuta) in flight, Gloucestershire, England

Alan Williams / Pintail (Anas acuta) male flapping wings after bathing, Martin Mere WWT reserve, Lancashire, UK, February

Mike Potts / Pintail ducks (Anas acuta), Four males courting one female, Martin Mere, Lancashire, UK February

Markus Varesvuo / Pintail (Anas acuta) duck female on water. Vantaa, Finland. January

David Kjaer / Northern Pintails (Anas acuta) males and female in flight, Gloucestershire, England

David Kjaer / Northern Pintail (Anas acuta) male and female in flight, Gloucestershire, England

David Kjaer / Pintails (Anas acuta) and Wigeon (Anas penelope) Gloucestershire, England

Alan Williams / Pintail (Anas acuta) male swimming on lake in winter Lancashire, UK, February

Alan Williams / Pintail (Anas acuta) two males fighting, lake Lancashire, UK, February

Benjamin Barthelemy / Female Pintail (Anas acuta) with chicks, Katmai National Park and Preserve, Alaska, USA, July.

David Tipling / Pintail (Anas acuta) male in icy water viewed from above, Hokkaido, Japan winter

Mark Carwardine / Adult male Northern pintail duck (Anas acuta) on water, Bosque del Apache National Wildlife Refuge, New Mexico, USA

Mark Carwardine / Adult male Northern pintail duck (Anas acuta) flying, Bosque del Apache National Wildlife Refuge, New Mexico, USA

Ernie Janes / Pintail duck (Anus acuta) drake swimming on water with reflection, UK, March.

David Tipling / 2020VISION / Pintail (Anas acuta) on water. Cambridgeshire Fens, England, March.

Nick Upton / Northern pintail (Anas acuta) pair mating while swimming on flooded pastureland, with female almost entirely submerged, Gloucestershire, UK, March

Nick Upton / Northern pintail (Anas acuta) pair dabbling for food with drake upended in flooded pastureland, Gloucestershire, UK, March

Todd Mintz / Northern pintail duck (Anas acuta) male in flight over prairie marsh, Sastatchewan, Canada, March

Todd Mintz / Northern pintail duck (Anas acuta) pair on water of prairie marsh, Sastatchewan, Canada, March

Markus Varesvuo / Pintail (Anas acuta) female in flight, Sweden, October

Peter Cairns / 2020VISION / Mixed flock of Shelduck (Tadorna tadorna), Pintail duck (Anas acuta) and small waders feeding on mudflats, with town in background, Morecambe Bay, Cumbria, England, UK, February

Gerrit Vyn / Northern Pintail (Anas acuta) female prospecting for nest sites early in the breeding season, Chukotka, Russia. May

Gerrit Vyn / Pintail duck (Anas acuta) male profile, Chukotka, Russia, May

Mike Read / Northern pintail (Anas acuta) male standing on ice, Bosque del Apache National Wildlife Refuge, New Mexico, USA

Fabrice Cahez / Northern Pintail (Anas acuta) in flight. River Allier, France, April.

Nature Production / Pintail duck (Anas acuta) male taking off from snow, Lake Kuccharo, Hokkaido, Japan, February

Nature Production / Pintail ducks (Anas acuta) facing each other, interacting, Iwate, Japan, February

Charlie Summers / A Pintail Duck (Anas acuta) male on water. Bosque del Apache, New Mexico, USA, January.

Mike Potts / Pintails (Anas acuta) in flight over the sea. Maltraeth Estuary, Anglesey, North Wales, UK, January

Mike Potts / Pintails (Anas acuta) feeding on mudflats at dusk. Cefni Estuary, Anglesey, North Wales, UK, December

Mike Potts / Pintails (Anas acuta) feeding on saltmarsh plants, Cefni Estuary. Anglesey, North Wales, UK, December

Mike Potts / Pintails (Anas acuta) in flight above Cefni Estuary. Anglesey, North Wales, UK, December

Mark Carwardine / Male Northern pintail duck (Anas acuta) Slimbridge, Gloucestershire, UK, November

Colin Varndell / Drake Pintail (Anas acuta) in breeding plumage. Slimbridge, Gloucestershire, UK, February

Dietmar Nill / Northern pintail (Anas acuta) male and female pair in flight, Germany

Peter Cairns / Silhouette of Pintail duck (Anas acuta) in flight at dusk, Lancashire, UK, December

David Tipling / Pintail {Anas acuta} in flight, Hokkaido, Japan, February

David Tipling / Looking down on flock of Pintail {Anas acuta} males and females, on frozen pool, Odaito, Hokkaido, Japan, Febraury

David Tipling / Pintail {Anas acuta} male in snow, Hokkaido, Japan, February

David Tipling / Pintail {Anas acuta} two males in snow, Hokkaido, Japan, February

David Tipling / Pintail {Anas acuta} male in flight over water, Hokkaido, Japan, February

Alan Williams / Pintail (Anas acuta) male on water, Martin Mere WWT reserve, Lancashire, UK, February

Alan Williams / Pintail (Anas acuta) male and female surface feeding, Martin Mere WWT reserve, Lancashire, UK, February

Alan Williams / Pintail (Anas acuta) male on water, calling, Martin Mere WWT reserve, Lancashire, UK, March

Alan Williams / Pintail (Anas acuta) male walking on ice, Martin Mere WWT reserve, Lancashire, UK, February

Alan Williams / Pintail (Anas acuta) male and female pair surface feeding, Martin Mere WWT reserve, Lancashire, UK, February

Alan Williams / Pintail (Anas acuta) female in flight, Martin Mere WWT reserve, Lancashire, UK, February

Alan Williams / Pintail (Anas acuta) male surface feeding, Martin Mere WWT reserve, Lancashire, UK, February

Alan Williams / Pintail (Anas acuta) male surface feeding, Martin Mere WWT reserve, Lancashire, UK, February

Alan Williams / Pintail (Anas acuta) male on water, Martin Mere WWT reserve, Lancashire, UK, February

Alan Williams / Pintail (Anas acuta) male in flight, slowing down to land, Martin Mere WWT reserve, Lancashire, UK, February

Alan Williams / Pintail (Anas acuta) male in flight, Martin Mere WWT reserve, Lancashire, UK, February

Alan Williams / Pintail (Anas acuta) female drinking, Martin Mere WWT reserve, Lancashire, UK, February

Alan Williams / Pintail (Anas acuta) male calling on water, Martin Mere WWT reserve, Lancashire, UK, February

Alan Williams / Pintail (Anas acuta) male flapping wings after bathing, Martin Mere WWT reserve, Lancashire, UK, February

Alan Williams / Pintail (Anas acuta) male bathing, Martin Mere WWT reserve, Lancashire, UK, February

Alan Williams / Pintail (Anas acuta) male bathing, Martin Mere WWT reserve, Lancashire, UK, February

Alan Williams / Pintail (Anas acuta) male flapping wings after bathing, Martin Mere WWT reserve, Lancashire, UK, February

Steve Knell / Pintail (Anas acuta) pair on water, Gloucestershire, England, January

Kerstin Hinze / Pintail (Anas acuta) adult male flying, Lake Tofutsu, Hokkaido, Japan

Kerstin Hinze / Pintail (Anas acuta) adult male flying, Lake Tofutsu, Hokkaido, Japan

Kerstin Hinze / Pintail (Anas acuta) adult male flying, Lake Tofutsu, Hokkaido, Japan

Kerstin Hinze / Pintail duck (Anas acuta) male flying, Lake Tofutsu, Hokkaido, Japan February 2007

Nigel Bean / Pintail (Anas acuta) adult male preening, Martin Mere WWT Reserve, Lancashire, November

Mike Potts / Pintail ducks (Anas acuta) in flight, Martin Mere, Lancashire, UK February

David Kjaer / Northern Pintail (Anas acuta) male or drake, Gloucestershire, England

David Kjaer / Northern Pintail (Anas acuta) males in flight, Gloucestershire, UK, (Digital composite)

David Kjaer / Northern Pintail (Anas acuta) male in flight, Gloucestershire, UK

Graham Eaton / Male Pintail (Anas acuta) UK, 2006

Graham Eaton / Male Pintail (Anas acuta) UK

Steve Knell / Pintail {Anas acuta} female duck landing on water with ice, Lancashire, UK, 2006

Paul Hobson / Male and female Pintails (Anas acuta) in flight, Gloucestershire, uk

Rolf Nussbaumer / Pintail (Anas acuta) pair mating, female pushed underwater, Port Aransas, Texas, USA. February 2003

Mike Potts / Pintails {Anas acuta} feeding on saltmarsh seeds during high tide, Lavan Sands, Gwynedd, Wales, UK.

David Kjaer / Northern Pintail ducks flying, two males and five females {Anas acuta} Gloucestershire, UK

David Kjaer / Northern Pintail ducks flying, four males and four females {Anas acuta} Gloucestershire, UK

Pete Cairns / Pintail (Anas acuta) adult male portrait, Martin Mere WWT, Lancashire, UK

Adrian Davies / Pintail duck (Anas acuta) male on water, UK

WILLIAM OSBORN / Pintail duck {Anas acuta} Male portrait, UK

Jose B. Ruiz / Pintail {Anas acuta} male, Ciudad Real, Spain

DAVID TIPLING / Pintail {Anas acuta} female, UK

Colin Seddon / Pintail duck {Anas acuta} UK

Tom Vezo / Pintail duck {Anas acuta} profile in wetlands, Bosque del Apache NWR, NM, USA.

Tom Vezo / Northern Pintail duck {Anas acuta} male in flight, Arizona, USA.

Tom Vezo / Northern Pintail duck {Anas acuta} California, USA.

Tom Vezo / Two Pintail duck {Anas acuta} in flight, South eastern Arizona, USA.

Tom Vezo / Three Pintail duck {Anas acuta} up ended in water, feeding, California, USA.

Russell Cooper / Male Pintail duck {Anas acuta}, UK

David Kjaer / Flock of Pintail duck in flight {Anas acuta} Gloucestershire, UK

David Kjaer / Pintail duck {Anas acuta} in flight, UK.

David Kjaer / Pintail duck {Anas acuta} in flight, UK.

TOM MANGELSEN / Pintail ducks in flight. (Anas acuta) Nebraska USA.

TOM MANGELSEN / Pintails (Anas acuta) in flight, Platte River, Nebraska USA.

David Kjaer / Pintail duck {Anas acuta} taking-off from water, UK.

David Kjaer / Pintail duck {Anas acuta} taking-off from water. UK.