Markus Varesvuo / Small flock consisting of three male and one female Gadwall (Anas strepera) in flight, Hungary, May

Terry Whittaker / 2020VISION / Gadwall (Anas strepera) female duck stretching wings on Rutland Water, Rutland, UK, April

Graham Eaton / Rear view of Gadwall (Anas strepera) drying its wings, London Wetland Centre, UK, August

Philippe Clement / Male Gadwall {Anas strepera} Belgium

Tim Fitzharris / Gadwall (Anas strepera) female taking flight from water, New Mexico

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

Nick Upton / Gadwall (Anas strepera) drake swimming past reeds in flooded marsh, RSPB Greylake, Somerset, UK, January.

David Pattyn / Gadwall (Anas strepera), Valkenhorst Nature Reserve, Valkenswaard, The Netherlands, June

David Tipling / Pied avocet (Recurvirostra avosetta) adult leading away a Gadwall (Anas strepera) from its nest North Norfolk, England, UK. May

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

Jussi Murtosaari / Gadwall (Anas strepera), adult female in water, Finland, April.

Jussi Murtosaari / Gadwall (Anas strepera), adult male, Finland, May.