Paul Hobson / Brown hairstreak (Thecla betulae) resting on Hawthorn (Crataegus monogyna). Lincolnshire, England, UK. July.

MYN / Dirk Funhoff / Brown hairstreak butterfly (Thecla betulae) pupa, Lorsch, Hessen, Germany. May. Meetyourneighbours.net project

Jussi Murtosaari / Brown hairstreak butterfly (Thecla betulae) female resting, Raasepori, Uusimaa, Etela-Suomi / South Finland, Finland. August

Jussi Murtosaari / Brown Hairstreak butterfly (Thecla betulae) male feeding on Plume thistle flower, southwest Finland, August.

Jussi Murtosaari / Brown Hairstreak butterfly (Thecla betulae) female, Aland Islands, Finland, August.

Jussi Murtosaari / Brown Hairstreak butterfly (Thecla betulae) female feeding on plume thistle flower, southern Finland, August.

Mike Read / Brown hairstreak butterfly (Thecla betulae) nectaring on Creeping thistle (Cirsium arvense) flower, Alners Gorse Reserve, Dorset, England, UK. August.

Mike Read / Brown hairstreak butterfly (Thecla betulae) female, resting on Blackthorn (Prunus spinosa), Alners Gorse Reserve, Dorset, England, UK. August.

Andy Sands / Brown hairstreak butterfly (Thecla betulae) male at rest with wings closed on Blackthorn leaf, Hertfordshire, England, UK, June. Focus stacked image. Captive

Andy Sands / Brown hairstreak butterfly (Thecla betulae) close up of pupa on Blackthorn leaf, Hertfordshire, England, UK, June.Focus stacked image. Captive

Andy Sands / Brown hairstreak butterfly (Thecla betulae) young larva on Blackthorn leaf, Hertfordshire, England, UK, June. Focus stacked image. Captive

Andy Sands / Brown hairstreak butterfly (Thecla betulae) larva close to pupation on Blackthorn leaf, Hertfordshire, England, UK, June. Focus stacked image. Captive