Ross Hoddinott / Small pearl-bordered fritillary butterfly (Boloria selene) roosting on Hard fern (Blechnum spicant) fiddlehead. Marsland Valley Wildlife Trusts Reserve, Cornwall, England, UK. June.

Edwin Giesbers / Small pearl bordered fritillary butterfly (Boloria selene) resting on stem. The Netherlands. August.

Edwin Giesbers / Small pearl bordered fritillary butterfly (Boloria selene), two resting on Scabious. The Netherlands. July.

Ross Hoddinott / Small pearl-bordered fritillary (Boloria selene) butterfly on oxeye daisy (Leucanthemum vulgare), Marsland mouth, North Devon, UK. May 2017.

Ross Hoddinott / Small pearl-bordered fritillary butterfly (Boloria selene), Marsland mouth, Cornwall, UK. JUne 2016.

Ross Hoddinott / Small pearl-bordered fritillary (Boloria selene), Marsland mouth, Cornwall/Devon, UK. May 2017.

Ross Hoddinott / Two small pearl-bordered fritillary butterflies (Boloria selene) resting on bluebell, Marsland mouth, North Devon, UK. May 2017.

Ross Hoddinott / Small pearl-bordered fritillary butterfly (Boloria selene), Marsland mouth, Cornwall, UK. JUne 2016.

Edwin Giesbers / RF - Titania's fritillary butterfly (Boloria titania) in mountain alpine meadow habitat, Aosta Valley, Gran Paradiso National Park, Italy. (This image may be licensed either as rights managed or royal...

Wim van den Heever / Julia heleconia (Dryas julia) butterfly on head of Yacare caiman (Caiman yacare) Pantanal, Brazil.

Ross Hoddinott / Small pearl bordered fritillary butterfly (Boloria selene) portrait, Marsland Mouth, North Devon, UK. May.

Jussi Murtosaari / Bog fritillary butterfly (Boloria eunomia) flying through habitat, Finland. June.

Edwin Giesbers / Zebra longwing butterfly (Heliconius charithonia) feeding on flower. Captive.

Edwin Giesbers / Zebra longwing butterfly (Heliconius charithonia) resting on leaf. Captive.

Edwin Giesbers / Two Tiger longwing butterfly (Heliconius hecale) mating on leaf edge. Captive.

Edwin Giesbers / Common postman butterfly (Heliconius melpomene) resting on leaf upside down. Captive.

Edwin Giesbers / Common postman butterfly (Heliconius melpomene) resting on leaf, wings open. Captive.

Edwin Giesbers / Digital composite of Tiger longwing butterfly (Heliconius hecale), Red postman butterfly (Heliconius erato) and Banded Orange Heliconian butterfly (Dryadula phaetusa) on flower. Captive.

Edwin Giesbers / Courtship of two Postman butterfly (Heliconius melpomene) on flower. Captive.

Edwin Giesbers / Numata longwing butterfly (Heliconius numata) resting on leaf. Captive.

Edwin Giesbers / Tiger heliconian butterfly (Heliconius ismenius) resting on leaf. Captive.

Edwin Giesbers / Julia butterfly (Dryas julia), wings open, resting on leaf. Captive.

Edwin Giesbers / Julia butterfly (Dryas julia) resting on leaf. Captive.

Edwin Giesbers / Sapho longwing butterfly (Heliconius sapho) resting on leaf. Captive.

Edwin Giesbers / Close up of Banded orange heliconian butterfly (Dryadula phaetusa) wing detail. Captive.

Edwin Giesbers / Pachinus longwing butterfly (Heliconius pachinus) resting on stem. Captive.

Paul Harcourt Davies / Shepherd's fritillary butterfly (Boloria pales), Apennine morph, feeding on flowering scabious, Sibillini, Umbria, Italy. July.

Paul Harcourt Davies / Shepherd's fritillary butterfly (Boloria pales), Apennine morph, feeding on flowering scabious, Sibillini, Umbria, Italy. July.

Ross Hoddinott / Small pearl-bordered fritillary (Boloria selene) roosting on common sorrel (Rumex acetosa), Marsland mouth, Devon, UK. May .

Ross Hoddinott / Small pearl-bordered fritillary (Boloria selene) basking on oak leaf, Marsland mouth, Devon, UK. May .

Karine Aigner / Ismenius tiger butterfly (Heliconius ismenius), Mindo, Ecuador.

Karine Aigner / Sara longwing butterfly (Heliconius Sara) at the Mindo butterfly Farm, Mariposas de Mindo, Mindo, Ecuador.

Karine Aigner / A man with a Heliconius butterfly on his face takes a selfie with his mobile phone, Mindo butterfly Farm (Mariposas de Mindo). Mindo, Ecuador.

Rolf Nussbaumer / Gulf fritillary butterfly (Agraulis vanillae), newly hatched caterpillar feeding on egg case. Hill Country, Texas, USA.

Rolf Nussbaumer / Gulf fritillary butterfly (Agraulis vanillae) egg. Hill Country, Texas, USA.

Rolf Nussbaumer / Gulf fritillary butterfly (Agraulis vanillae) resting on Passion vine (Passiflora sp). Hill Country, Texas, USA.

Rolf Nussbaumer / Gulf fritillary butterfly (Agraulis vanillae) resting on Passion vine (Passiflora sp). Hill Country, Texas, USA.

Rolf Nussbaumer / Gulf fritillary butterfly (Agraulis vanillae) on Passion vine (Passiflora sp), girl attempting to hold the butterfly by moving it on to her finger. Hill Country, Texas, USA. 2013. Model released.

Rolf Nussbaumer / Gulf fritillary butterfly (Agraulis vanillae) emerging from chrysalis. Hill Country, Texas, USA.

Rolf Nussbaumer / Gulf fritillary butterfly (Agraulis vanillae) emerging from chrysalis. Hill Country, Texas, USA. Sequence 10/10.

Rolf Nussbaumer / Gulf fritillary butterfly (Agraulis vanillae) emerging from chrysalis. Hill Country, Texas, USA. Sequence 9/10.

Rolf Nussbaumer / Gulf fritillary butterfly (Agraulis vanillae) emerging from chrysalis. Hill Country, Texas, USA. Sequence 8/10.

Rolf Nussbaumer / Gulf fritillary butterfly (Agraulis vanillae) emerging from chrysalis. Hill Country, Texas, USA. Sequence 7/10.

Rolf Nussbaumer / Gulf fritillary butterfly (Agraulis vanillae) emerging from chrysalis. Hill Country, Texas, USA. Sequence 6/10.

Rolf Nussbaumer / Gulf fritillary butterfly (Agraulis vanillae) emerging from chrysalis. Hill Country, Texas, USA. Sequence 5/10.

Rolf Nussbaumer / Gulf fritillary butterfly (Agraulis vanillae) emerging from chrysalis. Hill Country, Texas, USA. Sequence 4/10.

Rolf Nussbaumer / Gulf fritillary butterfly (Agraulis vanillae) emerging from chrysalis. Hill Country, Texas, USA. Sequence 3/10.