Jan Hamrsky / Clubtail dragonfly nymph (Gomphidae) crawling on sunken wood, Europe, May, controlled conditions

Jan Hamrsky / Clubtail dragonfly nymph (Gomphidae) burrowing itself into the sand, Europe, May, controlled conditions

Jan Hamrsky / Clubtail dragonfly nymph (Gomphidae), crawling on sunken wood, Europe, May, controlled conditions

Jan Hamrsky / Clubtail dragonfly nymph (Gomphidae), walking on stones at the bottom, Europe, May, controlled conditions

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

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

Wild Wonders of Europe / Möllers / Male Yellow clubtail dragonfly (Gomphus simillimus) resting on stone, Allier river, Pont-du-Chateau, Auvergne, France, August 2010

John Abbott / Gulf Coast clubtail dragonfly (Gomphus modestus) male resting with tail in the air, Louisiana, USA, June

John Abbott / Ashy clubtail dragonfly (Gomphus lividus) pair mating, Angelina National Forest, Jasper, Texas, USA, March

John Abbott / Gulf Coast clubtail dragonfly (Gomphus modestus) male resting with tail in the air, Louisiana, USA, June

John Abbott / Oklahoma Clubtail dragonfly (Gomphus oklahomensis) male at rest, Sam Houston National Forest, Texas, USA, April

Nature Production / Great Clubtail dragonfly (Sieboldius albardae) female, Japan

David Welling / Russet-tipped Clubtail Dragonfly (Stylurus plagiatus) perching on foliage. Rio Grande Calley, Hidalgo County, Texas, USA.

David Welling / Female Sulphur-tipped Clubtail (Gomphus militaris) perched on plant, Southeast Metropolitan Park, Travis County, Texas, USA

Thomas Marent / Club-tailed Dragonfly (Gomphus vulgatissimus), Switzerland

Michael Durham / Pacific Clubtail (Gomphus kurilis) dragonfly, photographed with a high-speed camera, coastal mountains, Oregon