Roger Powell / Gadwall pair (Mareca strepera) swimming in tandem. Potterick Carr Nature Reserve, Doncaster, Yorkshire, England, UK, March.

Nick Hawkins / American wigeon (Anas / Mareca americana) male, Anchorage Provincial Park, Grand Manan Island, New Brunswick, Canada, June.

Nick Hawkins / American wigeon (Anas / Mareca americana) male, Anchorage Provincial Park, Grand Manan Island, New Brunswick, Canada, June.

Nick Hawkins / American wigeon (Anas / Mareca americana) nest with seven eggs, Anchorage Provincial Park, Grand Manan Island, New Brunswick, Canada, June.

David Tipling / Eurasian wigeon (Anas penelope) male in flight, Holkham, north Norfolk, England, UK. January.

David Tipling / Eurasian wigeon (Anas penelope) male in flight against blue sky, Holkham, north Norfolk, England, UK. January.

Mateusz Piesiak / Eurasian wigeon (Mareca penelope) male, standing in snow, Wrolaw, Lower Silesia, Poland. February.

Mateusz Piesiak / Gadwall (Mareca strepera) portrait, Poland. February.

Nick Upton / Gadwall (Anas strepera) male courting two females, Magor Marsh nature reserve, Gwent Levels, Wales, UK, March.

Nick Upton / Gadwall (Anas strepera) male swimming, Magor Marsh nature reserve, Gwent Levels, Wales, UK, March.

Nick Upton / Mallard (Anas platyrhynchos), Common teal (Anas crecca) and Wigeon (Anas penelope) flock standing on frozen lake, Cannop Ponds, Forest of Dean, Gloucestershire, UK, December.

Robin Chittenden / Wigeon (Anas penelope) suffering from avian flu, resting on beach, Norfolk, UK. October, 2022.

Robin Chittenden / Six Northern eider (Somateria mollissima) and ten Eurasian wigeon (Anas penelope) flock in flight over sea, Cley, Norfolk, UK. November.

David Tipling / Wigeon (Anas penelope) flock on water in marshland, Buckenham Marshes RSPB Reserve, Norfolk, UK.

David Tipling / Wigeon (Anas penelope) flock feeding on marshland, Buckenham Marshes RSPB Reserve, Norfolk, UK.

Mike Read / Eurasian wigeon (Anas penelope) female, feeding in mud at edge of a pool, Catcott Lows Nature Reserve, Somerset, England, UK. March.

Bernard Castelein / Four Gadwall (Anas strepera) in flight, Zeeland, The Netherlands. September.

Roger Powell / Male Eurasian wigeon (Mareca penelope) swimming in estuary, River Coquet, Northumberland, England, UK. March.

Roger Powell / Eurasian Wigeon (Mareca penelope) flock in flight, Amble, Northumberland, England, UK. March.

Mike Potts / Widgeon (Anas penelope) group on flooded grassland, RSPB Cors Ddyga Reserve, Gaerwn, Anglesey, North Wales, July.

Oscar Dewhurst / Eurasian wigeon (Mareca penelope) flock in flight with industrial landscape of Teeside behind. Durham, UK. October

Oscar Dewhurst / Gadwall (Anas strepera) drake feeding on frozen lake. London, UK. February.

Roger Powell / Eurasian wigeon (Anas penelope) mixed gender flock in flight. Holy Island / Lindisfarne, Northumberland, England, UK. October

Mike Read / Eurasian wigeon (Anas penelope) and Common teal (Anas crecca) group in flight over a pool, Greylake RSPB reserve, near Greylake, Somerset Levels and Moors, Somerset, England, UK, February.

Jussi Murtosaari / Gadwall (Mareca strepera) male in flight. Kirkkosalmi, Finland. May.

Jussi Murtosaari / Gadwall (Mareca strepera) flock in flight. Kirkkosalmi, Finland. May.

Jussi Murtosaari / Widgeon (Mareca penelope) pair amongst reeds. Tervatehdas, Finland. April.

Oscar Dewhurst / Eurasian wigeon (Mareca penelope) in flight. Durham, UK. January.

John Chan / American wigeon (Mareca americana) makes a threat display, Bolsa Chica Ecological Reserve, Southern California, USA, November.

John Chan / American wigeons (Mareca americana) and Northern pintails (Anas acuta) foraging in a salt marsh, Bolsa Chica Ecological Reserve, Southern California, USA, November.

John Chan / American wigeons (Mareca americana) feeding over an eelgrass bed, Bolsa Chica Ecological Reserve, Southern California, USA, November.

John Chan / American wigeons (Mareca americana) feeding at twilight, Bolsa Chica Ecological Reserve, Southern California, USA, October.

Nigel Cattlin / Male Chiloe widgeon (Mareca sibilatrix) or southern widgeon swimming on the lake at the Arundel Wetland Centre, July