Doug Gimesy / Platypus (Ornithorhynchus anatinus) in early morning light on Lake Elizabeth, Great Otway National Park, near Forrest, Victoria, Australia, July 2017.

John Waters / Slow motion clip of a mixed flock of Teal (Anas crecca) and Wigeon (Anas penelope) landing in a lake, Greylake RSPB Reserve, Somerset Levels, England, UK, February.

David Pattyn / Tufted duck (Aytha fuligula) female portrait.The Netherlands. April..

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

Dave Watts / Platypus (Ornithorhynchus anatinus) swimming in lake, Tasmania, Australia.

Claudio Contreras / Waterfowl at dawn with mist, including Great blue heron (Ardea herodias herodias), American avocet (Recurvirostra americana), Northern shoveler (Anas clypeata), Xochimilco wetlands, Mexico City, Mexic...

Claudio Contreras / Aquatic plants (Typha sp.) with Mexico City buildings in the back, Xochimilco wetlands, Mexico City, January

David Pattyn / Shelduck (Tadorna tadorna) male trying to grab a female to mate with her. The Netherlands. April.

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

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

David Pattyn / Shelduck (Tadorna tadorna) portrait. The Netherlands. April.

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

David Pattyn / Tufted duck (Aytha fuligula) portrait of a male in breeding plumage. The Netherlands. April..

Laurent Geslin / Tufted Duck (Aythya fuligula) flock overwintering on Lake Leman / Geneva with city in background, Switzerland

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

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 Mallard (Anas platyrhynchos) duckling scurries across the surface of a lake, Derbyshire, England, UK, June

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 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.

Steve Gettle / Ring-necked Duck (Aythya collaris) male flying, Island Lake Recreation Area, Michigan

Andrew Parkinson / Tufted duck (Aythya fuligula) male on a tranquil lake in dawn mist. Derbyshire, UK, May. (non-ex)

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)

Alan Williams / Male Ruddy Duck (Oxyura jamaicensis) displaying on lake expelling air from breast feathers to form bubbles (captive bird) UK, May 2010

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

Sebastian Kennerknecht / Common Goldeneye (Bucephala clangula) male in breeding plumage on pond, Santa Cruz, Monterey Bay, California

Sebastian Kennerknecht / Ring-necked Duck (Aythya collaris) drake in breeding plumage calling, Santa Cruz, Monterey Bay, California

Graham Eaton / Mallard (Anas platyrhynchos) drake on lake with autumn reflections, Lancashire, UK, November

Konrad Wothe / Mallard (Anas platyrhynchos) duck, with chicks standing on a rock in the middle, of a lake, Germany

Tim Fitzharris / Redhead Duck (Aythya americana) male, Moses Lake, Washington

Doug Gimesy / Platypus (Ornithorhynchus anatinus) gliding quietly in the early morning light on Lake Elizabeth, Great Otway National Park, near Forrest, Victoria, Australia, September 2018.

Doug Gimesy / Platypus (Ornithorhynchus anatinus) in the early morning light on Lake Elizabeth (Great Otway National Park), near Forrest, Victoria, Australia, a remote mountain lake formed by a landslide. July.

Espen Bergersen / Harlequin duck (Histrionicus histrionicus) in river stream. Myvatn, Iceland. May.

Espen Bergersen / Barrow's goldeneye (Bucephala islandica) in partly frozen lake. Iceland, May.

Espen Bergersen / Harlequin duck (Histrionicus histrionicus) Jokulsarlon lake. Iceland 2016

Espen Bergersen / Common eider (Somateria mollissima) swimming in the Jokulsarlon lake. Iceland, May.

Espen Bergersen / Common eider (Somateria mollissima) performing courtship postures between ice bergs in the Jokulsarlon Lake, Iceland. May.

Espen Bergersen / Common eider (Somateria mollissima) between ice bergs in the Jokulsarlon lake. Iceland, May.

Espen Bergersen / Pair of Harlequin duck (Histrionicus histrionicus) Jokulsarlon lake. Iceland. May.

Oscar Dewhurst / Crested duck (Lophonetta specularioides) walking on a frozen Andean lake. Arequipa, Peru. September. Cropped

Oscar Dewhurst / Puna teal (Anas puna) standing in shallow water of an Andean lake. Arequipa, Peru. September. Cropped

Oscar Dewhurst / Yellow-billed teal (Anas flavirostris) swimming in Andean lake. Arequipa, Peru. September

Oscar Dewhurst / Puna teal (Anas puna) in flight over Huacarpay Lake. Cusco, Peru. February. Cropped

Heather Angel / Mandarin duck (Aix galericulata) pair mating on lake. Shanghai Zoo, China.

Marie Read / Red-breasted Mergansers (Mergus serrator) male in foreground performing courtship display to female in background (left), Aurora, New York, USA, April.

Nick Upton / Mallard drake (Anas platyrhynchos) dwarfs a drake Teal (Anas crecca) as it walks past it on a frozen lake, Gloucestershire, UK, February.

Nick Upton / Northern shoveler (Anas clypeata) group resting on water surface, Rutland Water, Rutland, UK, November.

Nick Upton / Shelduck (Tadorna tadorna) pair with their brood of young ducklings resting on the margins of lake, Gloucestershire, UK, June.

Nick Upton / Common teal (Anas crecca) pair walking across a frozen lake, Gloucestershire, UK, February.

Nick Upton / Mallard (Anas platyrhynchos) female walking on snow covered frozen lake in falling snow, Wiltshire, UK, March.

Nick Upton / Common teal / Eurasian teal (Anas crecca) drake dabbling for invertebrate food in soft mud on a lake margin, Gloucestershire, UK, January.

Suzi Eszterhas / Mallard (Anas platyrhynchos) mother and three-week-old ducklings, Spring Lake Regional Park, Santa Rosa, California

Suzi Eszterhas / Mallard (Anas platyrhynchos) one-week-old duckling, Spring Lake Regional Park, Santa Rosa, California

Suzi Eszterhas / Mallard (Anas platyrhynchos) mother and one-week-old ducklings, Spring Lake Regional Park, Santa Rosa, California

Lynn M. Stone / Ring-necked duck (Aythya collaris) drake. Lakeland, Florida, USA.

Oliver Hellowell / Photographer Oliver Hellowell taking pictures of Mallard duck (Anas platyrhynchos) Loch Morlich, Scotland, UK. August.

Lynn M. Stone / Ring-necked duck (Aythya collaris) drake paddling on lake, Lakeland, Florida, USA, December.

Marko Matesic/ BIA / Ferruginous Duck (Aythya nyroca) pair on pond, Krk, Croatia

Nick Upton / Northern shoveler (Anas clypeata) large group feeding co-operatively in a shallow lake by cricling in a dense raft, believed to stir up organic sediments for them to filter feed on, Gloucestershire, U...

Jeff Foott / Creek flowing into pond in autumn, Duck Brook, Acadia National Park, Maine

Gabriel Rojo / Lake duck, (Oxyura vittata), La Pampa, Patagonia

Gabriel Rojo / Lake duck, (Oxyura vittata), La Pampa, Patagonia

Gabriel Rojo / Lake duck, (Oxyura vittata) group of male and females, La Pampa, Patagonia

Mike Read / Gadwall (Anas strepera) male resting on vegetation in lake, Quinta do Lago, Ria Formosa Nature Reserve, Algarve, Portugal, February.

Eric Medard / Pair of Tufted ducks (Athya fuligula) mating on a lake, Mayenne, France, March.

Eric Medard / Male Tufted duck (Athya fuligula) stretching wings, Mayenne, France, March.

Eric Medard / Male Tufted duck (Athya fuligula) flying over a lake, Mayenne, France, March.

Eric Medard / Male Tufted duck (Athya fuligula) on lake in mist, Mayenne, France, March.

Eric Medard / Pair of Tufted ducks (Athya fuligula) on lake, Mayenne, France, March.

Eric Medard / Male Tufted duck (Athya fuligula) on lake, Mayenne, France, March.

Eric Medard / Female Tufted duck (Athya fuligula) on lake, Mayenne, France, March.

Eric Medard / Pair of Tufted ducks (Athya fuligula) on lake, male with an identification beak band, Mayenne, France, March.

Eric Medard / Female Tufted duck (Athya fuligula) on lake, Mayenne, France, March.

Eric Medard / Male Tufted duck (Athya fuligula) taking off from a lake, Mayenne, France, March.

Connor Stefanison / Bufflehead duck (Bucephala albeola) male swimming along Lost Lagoon, Stanley Park, Vancouver, British Columbia, Canada. February.

Bernard Castelein / Crested Duck (Anas specularioides) Laguna Canapa, Altiplano, Bolivia

Bernard Castelein / Crested duck (Anas specularioides) two resting on shore of Laguna Canapa, Altiplano, Bolivia

Bernard Castelein / Yellow-billed teal (Anas georgica) at Laguna Hedionda, between Polques and Quetena, Altiplano, Bolivia

Bernard Castelein / Yellow-billed teal (Anas georgica) on shore of Laguna Hedionda, Altiplano, Bolivia

Bernard Castelein / Yellow-billed teal (Anas georgica) Laguna Hedionda, Altiplano, Bolivia

Andy Trowbridge / Male Australasian shoveler (Anas rhynchotis) in flight over water. Lake Forsyth, Banks Peninsula, Christchurch, New Zealand. July.

Agustin Esmoris / Lake Duck (Oxyura vittata), Argentina

John Waters / Three Tufted ducks (Aythya fuligula) swimming and diving on a misty lake at dawn, Westhay Moor National Nature Reserve, Somerset Levels, England, UK, April.

John Waters / Three Tufted ducks (Aythya fuligula) swimming and diving on a misty lake at dawn, Westhay Moor National Nature Reserve, Somerset Levels, England, UK, April.

John Waters / Three Tufted ducks (Aythya fuligula) surfacing on a misty lake at dawn, Westhay Moor National Nature Reserve, Somerset Levels, England, UK, April.

Roy Mangersnes / Yellow-billed pintail (Anas georgica) on a small lake, Salisbury Plains, South Georgia.

Vladimir Medvedev / Mandarin duck (Aix galericulata) male and female on water, Lazo reserve, Sikhote Alin UNESCO Natural World Heritage Site, Primorskiy krai, Far East Russia. April.

Steve Downer / Two Mallard (Anas platyrhynchos) drakes swimming in Womere Pool, Cannock Chase AONB, Staffodshire, England, UK, April.

Dave Bevan / Female Mallard (Anas platyrhynchos) feeding with chicks, Gloustershire, England, UK. May.

Steve Downer / Grey heron (Ardea cinerea) swallowing a large fish, Birmingham, England, UK, June.

Steve Downer / Femle Mute swan (Cygnus olor) swimming on a lake with cygnets on her back, Birmingham, England, UK, May.

Steve Downer / Femle Mute swan (Cygnus olor) swimming on a lake with cygnets on her back, Birmingham, England, UK, May.

Steve Downer / Grey heron (Ardea cinerea) catching a fish, with Mallards (Anas platyrhynchos) swimming past, Birmingham, England, UK, May.

SCOTLAND: The Big Picture / Whooper swan (Cygnus cygnus) upending, feeding on a loch, with a pair of Eurasian wigeon (Anas penelope) swimming nearby, Scotland, UK, November.

SCOTLAND: The Big Picture / Two Whooper swans (Cygnus cygnus) feeding on a loch, with Eurasian wigeon (Anas penelope) swimming nearby, Scotland, UK, November.