Ben Hall / Shelducks (Tadorna tadorna) pair in flight at dusk, Lancashire, UK

Loic Poidevin / Two Common shelducks (Tadorna tadorna) in flight, Marais Breton, Vendée, France, January.

Dave Bevan / Family of Shelducks (Tadorna tadorna) feeding in shallow water, Carmarthenshire, Wales, UK, May.

Dong Lei / Ruddy shelducks (Tadorna ferruginea) in flight, Basongcuo National Park, Qinghai-Tibet Plateau, Tibet, China.

Dong Lei / Black storks (Ciconia nigra) foraging in muddy silt around lake, with other birds including White-tailed sea eagles (Haliaeetus albicilla) and Ruddy shelducks (Tadorna ferruginea) Napahai Lake, Zhongd...

David Tipling / Shelducks (Tadorna tadorna) mating, Cley Marshes Reserve, Norfolk, England, UK, March.

Nick Upton / Lapwings (Vanellus vanellus), Jackdaws (Corvus monedula) and Golden plover (Pluvialis apricarius) flying over flooded pastureland with mix of Greylag geese (Anser anser), Shelduck (Tadorna tadorna), W...

Ernie Janes / Shelduck (Tadorna tadorna) pair feeding, Norfolk, UK, April

Bernard Castelein / Pair of Ruddy Shelducks (Tadorna ferruginea) in flight over lake, Madhya Pradesh, India

Alan Williams / Male Shelducks (Tadorna tadorna) dabbling / surface feeding on lake, Lancashire, England, UK, February

Edwin Giesbers / Four Shelducks (Tadorna tadorna) silhouetted in flight, Lesbos, Greece,

Angelo Gandolfi / Pair of Shelducks (Tadorna tadorna) flying upstream, past a boat pulled up on the riverbank. Guadalquivir River, Coto Donana National Park, Andalusia, Spain.