Alan Williams / Beaver Bridge over River Conwy, near Betws-y-Coed, Snowdonia National Park, North Wales, UK, September 2018

Alan Williams / Domestic pigeons (Columba livia) flock in flight over houses, Cheshire, UK, June.

Alan Williams / Oystercatcher (Haematopus ostralegus) perched on rock on shore, North Uist, Outer Hebrides, Scotland, UK, May

Alan Williams / Two Red Kites (Milvus milvus) fighting in flight. Mid-Wales, UK, October 2010.

Alan Williams / Male Ruddy Duck (Oxyura jamaicensis) displaying on lake expelling air from breast feathers to form bubbles (captive bird) UK, May 2010

Alan Williams / Black-tailed Godwits (Limosa limosa) and Knots (Calidris canutus) in flight in early morning light, Dee Estuary, Merseyside, England, UK, February

Alan Williams / Robin (Erithacus rubecula) perched in snow covered branches, Cheshire, UK, January

Alan Williams / Robin (Erithacus rubecula) on snow covered lawn, Cheshire, UK, January

Alan Williams / Dunnock (Prunella modularis) perched on fence in garden, Cheshire, UK, January

Alan Williams / Female blackcap (Sylvia atricapilla) perched in garden shrub, Cheshire, UK, December

Alan Williams / Grey Heron (Ardea cinerea) in flight, being chased by Lapwing (Vanellus vanellus) North Wales, UK, May

Alan Williams / Wood warbler (Phylloscopus sibilatrix) singing in woodland, North Wales, UK, May