Hans Christoph Kappel / Brown Hairstreak Butterfly (Thecla betulae) Germany

Andy Sands / Brown Hairstreak {Thecla betulae} male basking with wings open, captive, UK.

Andy Sands / Brown Hairstreak {Thecla betulae} female basking with wings open, Captive, UK.

Andy Sands / Brown Hairstreak {Thecla betulae} sitting on Backthorn leaf with wings closed, Captive, UK.

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.

David Kjaer / Brown Hairstreak (Thecla betulae) female butterfly feeding on flower, Dorset, UK, August.

David Kjaer / Brown Hairstreak (Thecla betulae) male butterfly and Hoverfly feeding on blackberry blossom, Dorset, UK, August.

David Kjaer / Brown Hairstreak (Thecla betulae) male feeding on flower, Dorset, UK, August.

Robert Thompson / Brown hairstreak butterfly (Thecla betulae) feeding on bramble flower, Burren, County Clare, Republic of Ireland

Hans Christoph Kappel / Brown hairstreak butterfly {Thecla betulae} on leaf, Germany

Kim Taylor / Brown hairstreak butterfly eggs on twig {Thecla betulae} UK.

Kim Taylor / Brown hairstreak butterfly caterpillars on Blackthorn leaves {Thecla betulae} UK.

Kim Taylor / Brown hairstreak butterfly pupa amongst leaf litter {Thecla betulae} UK.

Kim Taylor / Brown hairstreak butterfly {Thecla betulae} female on oak leaves UK.

Kim Taylor / Brown hairstreak butterfly {Thecla betulae} female on oak leaves UK.

Paul Hobson / Brown hairstreak butterfly {Thecla betulae} on blackthorn, England

Paul Hobson / Brown hairstreak butterfly {Thecla betulae} on oak leaf, England

Paul Hobson / Brown hairstreak butterfly {Thecla betulae} on oak leaf, England

Paul Hobson / Brown hairstreak butterfly {Thecla betulae} on oak leaf, England

Paul Hobson / Brown hairstreak butterfly {Thecla betulae} on oak leaf, England

Kim Taylor / Eggs of Brown Hairstreak Butterfly (Thecla betulae) UK

Hans Christoph Kappel / Brown Hairstreak. C (Thecla betulae)

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

George McCarthy / Brown hairstreak butterfly female ovipositing {Thecla betulae} Hampshire UK

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