Guy Edwardes / Stone fly (Leuctra fusca) on Alternate-leaved Golden Saxifrage (Chrysosplenium alternifolium) Zelske Jame, Skocjan Karst Gorge, Rakov Skocjan, Slovenia, April

Jan Hamrsky / Stonefly nymph (Isoperla sp.), underwater, Europe, June, controlled conditions

Jan Hamrsky / Stonefly nymph (Isoperla sp.), underwater, Europe, June, controlled conditions

Jan Hamrsky / Stonefly nymph (Isoperla sp.), underwater, Europe, June, controlled conditions

Jan Hamrsky / Stonefly nymph (Isoperla sp.), underwater, Europe, June, controlled conditions

Jan Hamrsky / Stonefly nymph (Isoperla sp.), underwater, Europe, June, controlled conditions

Jan Hamrsky / Stonefly nymph (Isoperla sp.), swimming in the water column, Europe, June, controlled conditions

Jan Hamrsky / Stonefly nymph (Isoperla sp.), underwater, Europe, June, controlled conditions

Jan Hamrsky / Flathead mayfly nymph (Electrogena sp.) and Stonefly nymph (Isoperla sp.), underwater, Europe, June, controlled conditions

Phil Savoie / Exoskeletons of moulting nymphs of Giant stonefly / salmonfly (Pteronarcys californica) beside river, Yellowstone National Park, Montana, USA. July.

Phil Savoie / Exoskeletons of moulting nymphs of Freshwater giant stonefly (Pteronarcys californica) on riverside,Yellowstone National Park, Montana, USA. July.

Phil Savoie / Exoskeletons of moulting nymphs of Giant stonefly / salmonfly (Pteronarcys californica) on riverside,Yellowstone National Park, Montana, USA. July.

Phil Savoie / Stonefly (Pteronarcys californica) with Yellowstone cut throat trout (Oncorhynchus clarkii bouvieri), about to catch it from the water, Montana, USA, July.

Phil Savoie / Stonefly (Pteronarcys californica) with Yellowstone cut throat trout (Oncorhynchus clarkii bouvieri), about to catch it from the water, Montana, USA, July.

Phil Savoie / Stonefly (Pteronarcys californica) with Yellowstone cut throat trout (Oncorhynchus clarkii bouvieri), about to catch it from the water, Montana, USA, July.

Phil Savoie / Yellowstone cut throat trout (Oncorhynchus clarkii bouvieri) with a Stonefly (Pteronarcys californica) landed on its dorsal side, Montana, USA, July.

Phil Savoie / Stonefly (Pteronarcys californica) with Yellowstone cut throat trout (Oncorhynchus clarkii bouvieri), about to catch it from the water, Montana, USA, July.

Phil Savoie / Stonefly (Pteronarcys californica) on water, Montana, USA, July.

Phil Savoie / Yellowstone cut throat trout (Oncorhynchus clarkii bouvieri) catching Stonefly (Pteronarcys californica) Montana, USA, July.

Phil Savoie / Stonefly (Pteronarcys californica) with Yellowstone cut throat trout (Oncorhynchus clarkii bouvieri), about to catch it from the water, Montana, USA, July.

Phil Savoie / Stonefly (Pteronarcys californica) with Yellowstone cut throat trout (Oncorhynchus clarkii bouvieri), about to catch it from the water, Montana, USA, July.

Phil Savoie / Stonefly (Pteronarcys californica) with Yellowstone cut throat trout (Oncorhynchus clarkii bouvieri), about to catch it from the water, Montana, USA, July.

Phil Savoie / Stonefly (Pteronarcys californica) with Yellowstone cut throat trout (Oncorhynchus clarkii bouvieri), about to catch it from the water, Montana, USA, July.

Phil Savoie / Stonefly (Pteronarcys californica) with Yellowstone cut throat trout (Oncorhynchus clarkii bouvieri), about to catch it from the water, Montana, USA, July.

Phil Savoie / Stonefly (Pteronarcys californica) with Yellowstone cut throat trout (Oncorhynchus clarkii bouvieri), about to catch it from the water, Montana, USA, July.

Phil Savoie / Red-winged blackbird (Agelaius phoeniceus) with insect prey, Bozeman, Montana, USA, June.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus) female collecting food, Bozeman, Montana, USA, June.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus) female with insect prey for chicks, Bozeman, Montana, USA. June.

Kim Taylor / Stonefly (Isoperla species). Italy, July.

John Abbott / Stonefly (Perlesta sp.) flying, Tuscaloosa County, Alabama, USA Controlled conditions. June

John Abbott / Stonefly (Perlesta sp.) flying with eggs, Tuscaloosa County, Alabama, USA Controlled conditions. May

Nick Upton / Stonefly (Nemoura cinerea) resting on a lichen-covered fencepost beside a small stream, Avebury, Wiltshire, UK, April.

Jan Hamrsky / Stonefly (Plecoptera) emerging, Europe, May, controlled conditions

Jan Hamrsky / Stonefly (Plecoptera) emerging, Europe, May, controlled conditions

Jussi Murtosaari / February Red stonefly (Taeniopteryx nebulosa) on snow in spring, besdie water, central Finland, April.

Jussi Murtosaari / February Red stonefly (Taeniopteryx nebulosa) on snow, central Finland, April.

Jan Hamrsky / Stonefly nymph (Plecoptera) resting on the stones at the bottom, Europe, April, controlled conditions

Jan Hamrsky / Prong-gilled mayfly nymph (Leptophlebiidae) and Stonefly nymph (Plecoptera), hiding in the algae at the bottom, Europe, April, controlled conditions

Jan Hamrsky / Stonefly nymph (Plecoptera) grazing algae, Europe, April, controlled conditions

Jan Hamrsky / Stonefly nymph (Plecoptera), grazing algae, Europe, April, controlled conditions

Jan Hamrsky / Stonefly nymph (Plecoptera), grazing algae, Europe, April, controlled conditions

Jan Hamrsky / Stonefly nymph (Plecoptera), grazing algae, Europe, April, controlled conditions

Jan Hamrsky / Stonefly nymph (Plecoptera), grazing algae, Europe, April, controlled conditions

Jan Hamrsky / Stonefly nymph (Plecoptera) adhering to the stem of plant, Europe, May, controlled conditions

Jan Hamrsky / Stonefly (Plecoptera) larva on stem. Czech Republic. Controlled conditions.

MYN / Piotr Naskrecki / Stonefly (Leuctra sp) dorsal view, Concord, Massachusetts, USA, May. meetyourneighbours.net project

MYN / Piotr Naskrecki / Stonefly (Leuctra sp) Concord, Massachusetts, USA, May. meetyourneighbours.net project

Jan Hamrsky / Stonefly (Plecoptera) larva. Europe, April.

Jan Hamrsky / Stonefly (Plecoptera) larva. Europe, April.

Nature Production / Stonefly (Oyamia lugubris / gibba) Japan

MYN / Niall Benvie / Stonefly {Dinocras sp} larva, Alicante, Spainmeetyourneighbours.net project

John Cancalosi / Cast-off skins of the aquatic nymphs of the Giant stonefly {Plecoptera} Yellowstone River, Wyoming, USA

Duncan Mcewan / Stonefly {Perla} Scotland, UK

Nature Production / Stonefly larva {Paragnetina tinctipennis} Japan

Nature Production / Stonefly larva {Kamimuria uenoi} Japan

Nature Production / Stonefly larva {Oyamia sp} Japan

Nature Production / Wingless Stonefly larva {Scopura longa} Japan

Nature Production / Wingless Stoneflies mating {Scopura longa} Japan

Nature Production / Wingless Stonefly {Scopura longa} male recently emerged from larval case, Japan

Kim Taylor / Stone fly {Leuctra fusca} on balsam flower, Europe

Kim Taylor / Stone fly larva {Plecoptera}

Duncan Mcewan / Stonefly - aquatic nymph stage of development

Duncan Mcewan / Stonefly - aquatic nymph stage of development

Duncan Mcewan / Stonefly - aquatic nymph stage

Nature Production / Stonefly {Perla tibialis} larva, Japan

Jussi Murtosaari / February red stonefly (Taeniopteryx nebulosa) resting on snow, with trees and lake in background, Laukaa, Finland. March.

Jussi Murtosaari / February red stonefly (Taeniopteryx nebulosa) resting on snow, Laukaa, Finland. March.

Chris Mattison / Large adult stonefly (Dinocras cephalotes). Exmoor National Park, Devon, UK. June.

Chris Mattison / Aquatic larva of large stonefly (Dinocras cephalotes). Exmoor National Park, Devon, UK. June.