David Kjaer / Pearl-bordered Fritillary butterfly (Boloria euphrosyne) at rest on Bracken with wings closed, Bentley Wood, Wiltshire, England, UK

Stephen Dalton / Gulf Fritillary Butterfly (Agraulis vanillae) flying near cactus. Everglades, Florida, USA

Ross Hoddinott / Small pearl-bordered fritillary {Boloria selene}, Marsland mouth, Cornwall / Devon, UK.

Ross Hoddinott / Marsh fritillary {Euphydryas aurinia} butterfly resting on grass, Vealand fram {Devon Wildlife Trust nature reserve} near Holsworthy, Devon. UK

Ross Hoddinott / Small pearl bordered fritllary (Boloria selene) on Pyramidal orchid (Anacamptis pyramidalis) UK

Ross Hoddinott / Marsh fritillary (Euphydryas aurinia) butterfly resting, wings back-lit. Devon, UK

Ross Hoddinott / Marsh fritillary (Euphydryas aurinia) butterfly resting. Devon, UK

Ross Hoddinott / Marsh fritillary (Euphydryas aurinia) butterfly resting. Devon, UK

Ross Hoddinott / Marsh fritillary (Euphydryas aurinia) butterfly resting. Devon, UK

Paul Hobson / Silver washed fritillary {Argynnis paphia} chrysalis / pupa, UK.

Colin Varndell / Marsh fritillary butterfly {Euphydryas aurinia} on thistle. UK.

David Kjaer / Silver washed fritillary {Argynnis paphia} on flower. UK.