Jussi Murtosaari / Downy emerald (Cordulia aenea), male, Finland, June.

Jussi Murtosaari / Treeline emerald dragonfly (Somatochlora sahlbergi), newly emerged female, Lapland, Finland, July.

Jussi Murtosaari / Treeline emerald dragonfly (Somatochlora sahlbergi), newly emerged male, Lapland, Finland, July.

Jussi Murtosaari / Treeline emerald dragonfly (Somatochlora sahlbergi), newly emerged female, Lapland, Finland, July.

Jussi Murtosaari / Brilliant emerald dragonfly (Somatochlora metallica), male in flight, Uusimaa, Finland, August.

Jussi Murtosaari / Brilliant emerald dragonfly (Somatochlora metallica) resting male, Jyvaskyla Finland, July.

Jussi Murtosaari / Brilliant emerald (Somatochlora metallica) female resting, Finland, July.

Jussi Murtosaari / Northern emerald (Somatochlora arctica), male, Finland, July.

Jussi Murtosaari / Downy emerald (Cordulia aenea) in flight, Joutsa, Finland, July.

Jussi Murtosaari / Eurasian baskettail dragonfly (Epitheca bimaculata) with its nymph exoskeleton, Laukaa, Keski-Finland / Central Finland, Finland, June.

Jussi Murtosaari / Brilliant emerald dragonfly (Somatochlora metallica) male in flight, Hankasuo, Uurainen, Keski-Suomi, Lansi- ja Sisa-Suomi / Central and Western Finland, Finland. July

Jussi Murtosaari / Downy Emerald dragonfly (Cordulia aenea) resting, southern Finland, May.

Jussi Murtosaari / Yellow-spotted emerald dragonfly (Somatochlora flavomaculata) male in flight, South Karelia, southern Finland, June.

Jussi Murtosaari / Downy Emerald dragonfly (Cordulia aenea) in flight, South Karelia, southern Finland, June.

Jussi Murtosaari / Brilliant emerald dragonfly (Somatochlora metallica) flying over wetlaand habitat, central Finland, July.

Thomas Marent / Yellow-spotted Dragonfly (Somatochlora flavomaculata), Switzerland

Jan Hamrsky / Emerald dragonfly nymph (Corduliidae) portrait, Europe, May, controlled conditions

Jan Hamrsky / Emerald dragonfly nymph (Corduliidae), waiting for prey in vegetation at the bottom, Europe, May, controlled conditions

Jan Hamrsky / Emerald dragonfly nymph (Corduliidae), waiting for prey in vegetation at the bottom, Europe, May, controlled conditions

Jan Hamrsky / Emerald dragonfly nymph (Corduliidae), waiting for prey in vegetation at the bottom, Europe, May, controlled conditions

Jan Hamrsky / Emerald dragonfly nymph (Corduliidae), hiding in roots, Europe, May, controlled conditions

Jan Hamrsky / Emerald dragonfly nymph (Corduliidae), hiding in roots, Europe, May, controlled conditions

Jan Hamrsky / Emerald dragonfly nymph (Corduliidae) hiding in leaves at the bottom, Europe, May, controlled conditions

Jan Hamrsky / Emerald dragonfly nymph (Corduliidae) hiding in leaves at the bottom, Europe, May, controlled conditions

MYN / Piotr Naskrecki / Dragonfly (Somatochlora sp) at rest, Woburn, Massachusetts, USA, June. meetyourneighbours.net project

John Abbott / Selys' Sundragon dragonfly (Helocordulia selysii) male at rest, Boykin Springs Recreation Area, Texas, USA, March

Michael Durham / Spiny Baskettail (Epitheca spinigera) dragonfly female flying, coastal mountain near Florence, Oregon

Thomas Marent / Yellow-spotted Dragonfly (Somatochlora flavomaculata), Switzerland

Mitsuhiko Imamori / Dragonfly (Macromia amphigena) on stem, Shiga, Japan

Jussi Murtosaari / Eurasian baskettail dragonfly (Epitheca bimaculata) female resting. Jyvaskyla, Central Finland.June.

Jan Hamrsky / Emerald dragonfly nymph (Somatochlora metallica), Europe, April, controlled conditions

Konrad Wothe / Downy emerald dragonfly (Cordulia aenea) Cordulia arena, Upper Bavaria, Germany. May.

Danny Green / Downy Emerald (Cordulia aenea) male. Glen Affric, Scotland, July.