Andy Sands / Purple Hairstreak {Quercusia quercus} male on Oak leaf with wings partially open, Captive, UK

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.

Duncan Mcewan / Green Hairstreak Butterfly, summer, Scotland.

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

Robert Thompson / Blue-spot hairstreak butterfly (Satyrium spini) South of Casteil, French Pyrenees, France. May

Andy Sands / Purple hairstreak butterfly (Neozephyrus quercus) Roosting on an Oak leaf, Hertfordhire, England, UK, June

Robert Thompson / Blue-spot hairstreak butterfly (Satyrium spini) resting on plant. South of Casteil, Pyrenees Orientales, south west France. May.

Kim Taylor / Green hairstreak butterfly (Callophrys rubi). Apennines, Italy, May.

David Kjaer / Green hairstreak butterfly (Callophrys rubi) on hawthorn leaf, Wiltshire, England, UK, April.