Oscar Dewhurst / European robin (Erithacus rubecula) perched on snow-covered branch, Richmond Park, London, UK. January.

Oscar Dewhurst / Red knot (Calidris canutus) flock at high tide roost. Snettisham, Norfolk, UK. October.

Oscar Dewhurst / Mandarin duck (Aix galericulata) drake swimming on pond, backlit by rising sun and bokeh effect, Richmond Park, London, UK. February.

Oscar Dewhurst / Shelduck (Tadorna tadorna) landing on water. Gloucestershire, England, UK. March

Oscar Dewhurst / Mute swan (Cygnus olor) swimming through ice. Richmond Park, London, England, UK. December

Oscar Dewhurst / Canada geese (Branta canadensis) in flight low over lake at sunrise in mist. London, UK. November

Oscar Dewhurst / Western marsh harrier (Circus aeruginosus) being mobbed by black-headed gulls (Chroicocephalus ridibundus) as it takes off with chick. Suffolk, England, UK. June

Oscar Dewhurst / Mute swan (Cygnus olor) cygnet swimming. Richmond Park, London, UK. May

Oscar Dewhurst / Grey squirrel (Sciurus carolinensis) stood upright on short grass. London, England, UK. March.

Oscar Dewhurst / Eurasian coot (Fulica atra) males fighting over territory. London, England, UK. December.;

Oscar Dewhurst / Mute swan (Cygnus olor) pair at sunrise. London, UK. December.

Oscar Dewhurst / Mute swan (Cygnus olor) parents and cygnets on a misty lake at sunrise. London, UK. May

Oscar Dewhurst / Mute swan (Cygnus olor) parent and cygnets swimming. London, UK. May

Oscar Dewhurst / Mute swan (Cygnus olor) cygnets and parents swimming. London, UK. May

Oscar Dewhurst / Mute swan (Cygnus olor), two cygnets sheltering under parent's wing. Richmond Park, London, England, UK. April.

Oscar Dewhurst / Mute swan (Cygnus olor) swimming with cygnets in misty lake in morning light. Richmond Park, London, England, UK. May.

Oscar Dewhurst / Hoatzin (Ophisthocomus hoazin) perched on wooden bar overlooking oxbow lake. Manu National Park, Madre de Dios, Peru. September

Oscar Dewhurst / Great bittern (Botaurus stellaris) with recently caught fish prey in beak. Suffolk, UK. November.

Oscar Dewhurst / Great bittern (Botaurus stellaris) head and neck, looking up through reeds. Suffolk, UK. November.

Oscar Dewhurst / Great bittern (Botaurus stellaris) in flight over water. London, UK. December.

Oscar Dewhurst / Great bittern (Botaurus stellaris) portrait. Suffolk, UK. November.

Oscar Dewhurst / Red Fox (Vulpes vulpes) sitting on grass bank. London, UK. October

Oscar Dewhurst / Red Fox (Vulpes vulpes) watching prey through long grass. London, UK. November

Oscar Dewhurst / Red fox (Vulpes vulpes) sitting on a frozen lake at the edge of the reeds. London, UK. December.

Oscar Dewhurst / Red Fox (Vulpes vulpes) running through deep snow. London, UK. January

Oscar Dewhurst / Red Fox (Vulpes vulpes), hunting in the frost, London, UK. November

Oscar Dewhurst / Red Fox (Vulpes vulpes) scavenging for food in a rubbish skip. London, UK. November

Oscar Dewhurst / Fallow deer (Dama dama) walking across frost-covered playing fields at dawn, with tower blocks of London in the background. Richmond Park, London, UK. December

Oscar Dewhurst / Red deer (Cervus elaphus) stag roaring, silhouetted under trees at sunrise. Bushy Park, London, UK. September

Oscar Dewhurst / Black-legged kittiwake (Rissa tridactyla) adult perched on the side of the Tyne Bridge, overlooking Newcastle and the Tyne. Newcastle, UK. July

Oscar Dewhurst / Black-legged kittiwake (Rissa tridactyla) adults and chicks on nests on the Tyne Bridge. Newcastle, UK. July.

Oscar Dewhurst / European robin (Erithacus rubecula) perched on fence post, Richmond Park, London, UK. January.

Oscar Dewhurst / European robin (Erithacus rubecula) perched on dry bracken, Richmond Park, London, UK. January.

Oscar Dewhurst / European robin (Erithacus rubecula) perched on dry bracken, Richmond Park, London, UK. January.

Oscar Dewhurst / Female Mandarin duck (Aix galericulata) swimming on pond in falling snow, Richmond Park, London, UK. January.

Oscar Dewhurst / Mandarin duck (Aix galericulata) pair swimming on icy pond in falling snow, Richmond Park, London, UK. January.

Oscar Dewhurst / Mandarin duck (Aix galericulata) drake standing on frozen lake in falling snow, Richmond Park, London, UK. January.

Oscar Dewhurst / Mandarin duck (Aix galericulata) drake standing on frozen lake in falling snow, Richmond Park, London, UK. January.

Oscar Dewhurst / Common gull (Larus canus) in flight in falling snow, London, UK. January.

Oscar Dewhurst / Black-headed gull (Chroicocephalus ridibundus) in flight in falling snow, London, UK. January.

Oscar Dewhurst / Mandarin duck (Aix galericulata) drake swimming on pond in falling snow, Richmond Park, London, UK. January.

Oscar Dewhurst / Female Mandarin duck (Aix galericulata) standing on ice-covered pond, Richmond Park, London, UK. February.

Oscar Dewhurst / Mandarin duck (Aix galericulata) drake swimming on pond in falling snow, Richmond Park, London, UK. February.

Oscar Dewhurst / Great tit (Parus major) standing on frozen lake, London, UK. February.

Oscar Dewhurst / Mandarin duck (Aix galericulata) drake walking on snow-covered, frozen lake, London, UK. February.

Oscar Dewhurst / Mute swan (Cygnus olor) splashing water with beak to wash itself in lake, London, UK. February.

Oscar Dewhurst / Three Egyptian geese (Alopochen aegyptiaca) goslings running across frozen lake, London, UK. February.

Oscar Dewhurst / Treecreeper (Certhia familiaris) feeding underneath a tree branch, London, UK. February.