David Pattyn / European pochard (Aythya ferina) drake male on a misty morning, Valkenhorst Nature Reserve, Valkenswaard, The Netherlands, May

David Pattyn / European pochard (Aythya ferina) female on a misty morning, Valkenhorst Nature Reserve, Valkenswaard, The Netherlands, May

David Pattyn / European pochard (Aythya ferina) male and female. Couple, Valkenhorst Nature Reserve, Valkenswaard, The Netherlands, April

David Pattyn / European pochard (Aythya ferina) male / drake, Valkenhorst Nature Reserve, Valkenswaard, The Netherlands, April

David Pattyn / European pochard (Aythya ferina) male drake in flight, Valkenhorst Nature Reserve, Valkenswaard, The Netherlands, March

David Pattyn / European pochard (Aythya ferina) yound chick preening its feathers, Valkenhorst Nature Reserve, Valkenhorst, the Netherlands, July

Markus Varesvuo / Tufted duck (Aythya fuligula) flock on sea. Uto, Paragas, Finland. March.

Markus Varesvuo / Tufted duck (Aythya fuligula) flock in coastal waters. Uto, Paragas, Finland. March.

Pedro Narra / Common pochard (Aythya ferina) on water, Sado Estuary, Portugal. April

Hermann Brehm / Pochard (Aythya ferina) male, Germany, May.

Markus Varesvuo / Tufted duck (Aythya fuligula) on water, Uto, Finland, February .

Mike Read / Common pochard (Aythya ferina) female on mat of vegetation with European pond terrapin (Emys obicularis) in the lake at Quinta do Lago, part of the Ria Formosa Nature Reserve, Algarve, Portugal, Febru...