Ingo Arndt / Caddisfly (Phryganea bipunctata) case built out of bark fragments and sticks, Germany, November.

Ingo Arndt / Caddisfly (Limnephilus sp) case built out of seeds and snail shells, Germany.

Jan Hamrsky / Case-building caddisfly larva (Triaenodes bicolor) on Horsetail (Equisetum sp), Europe, May. Controlled conditions.

MYN / Tim Hunt / Caddis fly (Limnephilus rhombicus) Barnt Green, Worcestershire, UK, April. meetyourneighbours.net project

MYN / Tim Hunt / Caddis fly (Limnephilus rhombicus) Barnt Green, Worcestershire, UK, April. meetyourneighbours.net project

Jan Hamrsky / Case-building caddisfly larva (Leptoceridae) Europe, July, controlled conditions

Jan Hamrsky / Case-building caddisfly larva (Ceraclea) in the shelter made of freshwater sponge (Spongilla lacustris) Europe, July, controlled conditions

Jussi Murtosaari / Moth (Semblis atrata) adult in habitat, central Finland, May.

Jussi Murtosaari / Moth (Semblis atrata) on leaf, central Finland, May.

Will Watson / Caddis (Limnephilus sp.) case made with shells and a water beetle (Haliplus lineatocollis), Little Lugg, Herefordshire, England, UK. Focus stacked.

Edwin Giesbers / Speckled Peter caddisfly (Agrypnia varia). De Kaaistoep Nature Reserve, Tilburg, The Netherlands. June. Controlled conditions.

Edwin Giesbers / Speckled Peter caddisfly (Agrypnia varia). De Kaaistoep Nature Reserve, Tilburg, The Netherlands. June. Controlled conditions.