Still the only red-eyed blue damselfly in much of northern Europe, although Erythromma viridulum is expanding into its range. The classic image of this species is of a male perched flat on a lily-pad, appearing dark grey with three patches of colour: red eyes and blue thorax and tail-end.
Total: 30-36 mm.
Abdomen: 25-30 mm.
Hindwing: 19-24 mm.
Calm and standing richly-vegetated waters, such as ponds, ditches and canals, usually with floating leaves of water-lilies (Nuphar, Nymphaea, Nymphoides) or pondweeds (Potamogeton).
From April to August. Most abundant in May and June.