Jack Dykinga / Flocks of Mallard ducks (Anas platyrhynchos) taking off in tree-lined wetlands. Bosque del Apache National Wildlife Refuge, New Mexico, USA.

George Sanker / Mallard (Anas platyrhynchos) pair greeting on snow-covered pond. Acadia National Park, Maine, USA.

George Sanker / Mallard (Anas platyrhynchos)pair greeting on snow-covered pond. Acadia National Park, Maine, USA.

Bence Mate / Flock of Mallard ducks (Anas platyrhynchos) taking off, Lake Csaj, Kiskunsagi National Park, Pusztaszer, Hungary. December.

Ross Hoddinott / Mallard duck (Anas platyrhynchos) drake swimming through reflection of house, Bude canal, Cornwall, UK. April 2015.

David Pattyn / Mallard (Anas platyrhynchos) portrait while calling. The Netherlands. April..

David Pattyn / Mallard (Anas platyrhynchos) female and young. The Netherlands. May 2014

David Pattyn / Mallard (Anas platyrhynchos) female. The Netherlands.April 2014

David Tipling / 2020VISION / Mallard (Anas platyrhynchos) male flying low over water. Cambridgeshire Fens, England, March.

Fergus Gill / 2020VISION / Mallard Duck (Anas platyrhynchos) with bread in snow. Perthshire, Scotland, January.

Erlend Haarberg / Male Mallard (Anas platyrhynchos) walking on ice, Trondheim, Norway, January

Nick Upton / Mallard (Anas platyrhynchos) drake sliding on fresh snow after landing on frozen lake surface, Wiltshire, UK, February

Bertie Gregory / 2020VISION / Female Mallard (Anas platyrhynchos), swimming on river, Bradfield Nature Reserve, Berkshire, England, UK, April

Bertie Gregory / 2020VISION / Mallard (Anas platyrhynchos) ducklings, Bradfield Nature Reserve, Berkshire, England, UK, May

Andrew Parkinson / 2020VISION / A line of Mallard (Anas platyrhynchos) ducklings swimming on a still lake, Derbyshire, England, UK, June. Did you know? A Mallard duck will lay more than half her body weight in eggs.

Andrew Parkinson / 2020VISION / A line of Mallard (Anas platyrhynchos) ducklings swimming on a still lake, Derbyshire, England, UK, June. Did you know? Ducklings take 50-60 days to fledge and become independent.

Andrew Parkinson / 2020VISION / Two Mallard (Anas platyrhynchos) ducklings standing up to shake their wings after bathing, Derbyshire, England, UK, June

Andrew Parkinson / 2020VISION / An adult male Mallard (Anas platyrhynchos) comes in to land, backlit by evening sunlight, Derbyshire, England, UK, March. Did you know? In addition to the colour differences between male and female du...

Andrew Parkinson / 2020VISION / A line of Mallard (Anas platyrhynchos) ducklings swimming on a still lake, Derbyshire, England, UK, June

Andrew Parkinson / 2020VISION / A sub-adult female Mallard (Anas platyrhynchos) swimming on a still lake, Derbyshire, England, UK, June

Andrew Parkinson / 2020VISION / A Mallard (Anas platyrhynchos) duckling scurries across the surface of a lake, Derbyshire, England, UK, June

Mark Hamblin / 2020VISION / Close-up head portrait of a male Mallard (Anas Platyrhynchos), Scotland, UK, December 2010

Andrew Parkinson / Mallard (Anas platyrhynchos) line of ducklings follow their mother through early morning mist, Derbyshire, UK, June.

Nick Upton / 2020VISION / Mallard Duck (Anas platyrhynchos) female nesting in ornamental stone flowerpot among Pansies (Viola x wittrockiana), camouflaged as people walk by. Parade Gardens Park, Bath, UK, June.

Nick Upton / 2020VISION / Mallard Duck (Anas platyrhynchos) female nesting in ornamental stone flowerpot among Pansies (Viola x wittrockiana). Parade Gardens Park, Bath, UK, June. Did you know? A female mallard may lay more th...

Nick Upton / 2020VISION / Mallard Duck (Anas platyrhynchos) female nesting in ornamental stone flowerpot among Pansies (Viola x wittrockiana), camouflaged as people walk by. Parade Gardens Park, Bath, UK, June.

Edwin Giesbers / Five Mallard (Anas platyrhynchos) walking in a line across snow. Three males and two females. The Netherlands, January.

Edwin Giesbers / Four Mallard (Anas platyrhynchos) dabbling for food in icy water. The Netherlands, January.

Florian Möllers / Photographer Florian Mollers having breakfast beside a female Mallard (Anas platyrhynchos) nesting in window box of a 4th floor flat, Berlin, Germany, June. Model released

Florian Möllers / Mallard (Anas platyrhynchos), female nesting in window box of a 4th floor flat, Berlin, Germany, June

Laurent Geslin / Mallard duck (Anas platyrhynchos) in an urban setting with graffiti in background

Andrew Parkinson / Pair of Mallard ducks (Anas platyrhynchos) on a lake in dawn, Derbyshire, UK. April (non-ex)

Andrew Parkinson / Mallard (Anas platyrhynchos) male standing on a frozen lake during a snowfall, Derbyshire, UK. (non-ex)

Laurent Geslin / Mallard ducks (Anas platyrhynchos) females looking skyward together on the shore of Lake of Geneva, France, June.

Laurent Geslin / Mallard ducks (Anas platyrhynchos) flying down river in Pairs, France. March.

Laurent Geslin / Mallard ducks (Anas platyrhynchos) male and female flying in Paris, France. March.

Paul Hobson / Mallard drake (Anas platyrhynchos) portrait of male on water, with autumn colours reflecting. Lancashire, England, UK. November.

Paul Hobson / Mallard drake (Anas platyrhynchos) male on water, with autumn colours reflecting. Lancashire, England, UK. November.

Wild Wonders of Europe / Geslin / Mallard (Anas platyrhynchos) male in flight in the Vatican garden, Rome, Italy, March 2010

Robin Chittenden / Mallard ducks (Anas platyrhynchos) in flight over water, Whitlingham CP, Norfolk, England, February

Andrew Walmsley / Mallard (Anas platyrhynchos platyrhynchos) ducklings following mother, Kaikoura, New Zealand, November

Andy Rouse / Female Mallard duck (Anas platyrhynchos) sitting on ice, Canada

Andy Rouse / Male Mallard duck (Anas platyrhynchos) landing in snow, Canada

Andy Rouse / Male Mallard duck (Anas platyrhynchos) in snow, Canada

Andy Rouse / Female Mallard duck (Anas platyrhynchos) landing in snow, Canada

Markus Varesvuo / Mallard (Anas platyrhynchos) male, flying low over water, Helsinki, Finland

Mark Carwardine / Mallard (Anas platyrhynchos) drake flying, Bosque del Apache National Wildlife Refuge, New Mexico, USA