Length: 29mm

Flight period: June to September

A small damselfly with a bronze-black top of the thorax and grey, rather than black, legs.

Male: eyes brownish red with shoulder stripes usually broken Segment 9 to 10 of the abdomen is blue with a black X on segment 10.

Female: complete, thin green or blue ante-humeral lines. Eyes brown-green and only small areas of blue on segment 9-10.

Where to See

Latin NameErythromma viridulum

Found on ponds, lakes and ditches and sometimes on brackish water. It seems to be associated with floating vegetation such as Hornwort and Water Milfoil.

Status & Distribution

Recent colonist (first records 1999). Spread spectacularly through southeast England and the Isle of Wight in the years immediately following its first appearances. Has now reached Devon in the west and North Yorkshire in the north, but expansion has slowed.

Similar Species

The similar, but larger, Red-eyed Damselfly is sometimes found in the same habitat and careful observation is needed to distinguish the two species. Could be confused with the Blue-tailed Damselflies Ischnura elegans and I. pumilio, but these insects do not have red eyes.

Species GroupDamselflies
Identification Notes
  • Smaller than the Red-eyed Damselfly with brownish-red eyes.
  • Male has blue tip on the abdomen.
  • Female has bold antehumeral stripe on the thorax.
  • Favours lakes, gravel pits and ponds with floating vegetation.
  • Recent migrant to the UK with the first observations in 1998. Spreading from the South-East of England.
  • Length: 29mm
  • July – August