Grayling Hipparchia semele

Cryptic colouring provides the Grayling with excellent camouflage, making it difficult to see when at rest on bare ground, tree trunks, or stones. The wings are kept closed when not in flight and the forewings are usually tucked behind the hind wings. Image: Paul Kitchener (Flickr)

Find out more: iNaturalist, Butterfly Conservation, UK Butterflies