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 / Rose-ringed parakeet (Psittacula krameri) feeding on cherry tree (Prunus) flowers in evening light. London, England, UK, May.

Oscar Dewhurst / European robin (Erithacus rubecula) male singing from blossoming cherry tree (Prunus). London, England, UK, March.

Oscar Dewhurst / Blackbird (Turdus merula) adult female collecting nesting material from garden lawn. London, England, UK, March.

Oscar Dewhurst / Grey heron (Ardea cinerea) immature portrait. London, England, UK, December.

Oscar Dewhurst / Eurasian jay (Garrulus glandarius) foraging in autumn leaves. London, England, UK. November.

Oscar Dewhurst / European robin (Erithacus rubecula) perched on tree branch with autumn colours behind. London, England, UK, November.

Oscar Dewhurst / Eurasian coot (Fulica atra) recently-hatched chicks and unhatched egg in nest. London, UK, May.

Oscar Dewhurst / Ptarmigan (Lagopus muta) on decking of a house. Iceland. October.

Oscar Dewhurst / Pochard (Aythya ferina) drake swimming after surfacing from a dive for food. London, England, UK. March

Oscar Dewhurst / European starling (Sturnus vulgaris) singing perched on the grass. London, England, UK, March.

Oscar Dewhurst / Whooper swan (Cygnus cygnus) adult in falling snow. Iceland. October.

Oscar Dewhurst / Egyptian goose (Alopochen aegyptiaca) portrait. London, England, UK. November.

Oscar Dewhurst / Egyptian goose (Alopochen aegyptiaca) standing on short grass with autumn trees behind. London, England, UK. November.

Oscar Dewhurst / Eurasian sparrowhawk (Accipiter nisus), in flight over marshland. London, England, UK, December. Cropped

Oscar Dewhurst / Great-crested grebe (Podiceps cristatus) bird in winter plumage with fish prey. London, England, UK. December.

Oscar Dewhurst / Eurasian sparrowhawk (Accipiter nisus), hunting snipe over marshland. London, England, UK. December. Cropped

Oscar Dewhurst / Carrion crow (Corvus corone) chasing Eurasian sparrowhawk (Accipiter nisus). London, England, UK, November. Cropped

Oscar Dewhurst / Photographer photographing Common darter (Sympetrum striolatum) which landed on his arm. London, England, UK. September.

Oscar Dewhurst / Photographer photographing Common darter (Sympetrum striolatum) which landed on his arm. London, England, UK. September.

Oscar Dewhurst / Grey heron (Ardea cinerea) standing in the water with nesting material in its beak. London, England, UK. February.

Oscar Dewhurst / Grey heron (Ardea cinerea) flying through falling snow. London, England, UK. January.

Oscar Dewhurst / Tufted duck (Aythya fuligula) male flapping its wings. London, England, UK. February

Oscar Dewhurst / Eurasian siskin (Carduelis spinus), male, feeding on alder seeds, London, England, UK. December.

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

Oscar Dewhurst / Grey heron (Ardea cinerea) immature perched on snow-covered bridge. London, England, UK. February.