Gomphus vulgatissimus, the common clubtail, is a medium-sized (wingspan 6 –7 cm.)

Its natural habitats are clean, slow moving streaming rivers and creeks with sandy soil.

As the common name suggests, this medium-sized species has a distinctive club-shaped abdomen.

The males are black with extensive yellow markings on the thorax and abdomen which turn green as the insect ages.

In the British Isles the adult flight period extends from mid May to early July.broski