Rod Williams / Female Essex skipper butterfly (Thymelicus lineola) on common ragwort, Sutcliffe Park Nature Reserve, Eltham, London, England, July

Will Watson / Underside of Essex skipper (Thymelicus lineola), on Spear Thistle (Cirsium vulgare), Worcestershire England, UK, July

David Kjaer / Essex skipper butterfly (Thymelicus lineola) male visiting flower,, Wiltshire, England, UK, July.

Russell Cooper / Essex Skipper (Thymelicus lineola) feeding from Bird's-foot-trefoil (Lotus corniculatus) Surrey, England, UK. July.

Jussi Murtosaari / Essex skipper butterfly (Thymelicus lineola) female on Willowleaf yellowhead (Inula salicina) Kumlinge, Ahvenanmaa / Aland Islands Archipelago, Finland. August

Paul Hobson / Essex skipper (Thymelicus lineola) pair mating, Bulgaria.

Robert Thompson / Essex skipper butterfly (Thymelicus lineola) on seedhead, North of Isola village, Mercantour National Park, Provence, France, June.

Robert Thompson / Essex skipper butterfly (Thymelicus lineola) on seedhead, North of Isola village, Mercantour National Park, Provence, France, June.

Jussi Murtosaari / Essex Skipper butterfly (Thymelicus lineola) flying in grassland habitat, Aland Islands, Finland, July.

Jussi Murtosaari / Essex Skipper (Thymelicus lineola) on Mountain Apollo (Parnassius apollo) butterfly wing, southwest Finland, July.

Jussi Murtosaari / Essex Skipper butterfly (Thymelicus lineola) male on Hawksbit flower central Finland, July.

Silvia Reiche / European Skipper (Thymelicus lineola) butterfly on Tufted Vetch (Vicia cracca), Hohe Tauern National Park, Austria