MYN / Emanuele Biggi / Swallowtail butterfly (Papilio machaon) three different coloured chrysalises, Italy, February. Meetyourneighbours.net project

MYN / Emanuele Biggi / Swallowtail butterfly (Papilio machaon) seven different coloured chrysalises arranged in a circle, Italy, February. Meetyourneighbours.net project

MYN / Emanuele Biggi / Swallowtail butterfly (Papilio machaon) four different coloured chrysalises, Italy, February. Meetyourneighbours.net project

Konrad Wothe / Army Ants (Eciton burchelli) workers carrying pupae during migration phase with large soldier ant, in rainforest at Tambopata river, Tambopata National Reserve, Peru, South America.

Adrian Davies / Adonis Blue Butterfly (Lysandra bellargus) pupa with attending Red ants (Myrmica sabuleti) Surrey, England, UK, August.

Adrian Davies / 6-Spot Burnet Moth (Zygaena filipendulae) newly emerged adult with chrysalis, Devon, England, UK, July.

Adrian Davies / Adonis Blue Butterfly (Lysandra bellargus) pupa with attending Red ants (Myrmica sabuleti) Surrey, England, UK, August.

Jan Hamrsky / Black fly pupa (Simuliidae) attached to the stem of aquatic plant, Europe, August, controlled conditions

Jan Hamrsky / Empty caddisfly cases after emerging (Trichoptera) Europe, August, controlled conditions

Jan Hamrsky / Black fly larva and pupa (Simuliidae) attached to the stem of aquatic plant, Europe, August, controlled conditions

Jan Hamrsky / Diving beetle larva (Hyphydrus ovatus) Europe, July, controlled conditions

Pete Oxford / Orange Tiger (Tithorea harmonia) chrysalises, Napo River, Yasuni National Park, Amazon, Ecuador