The largest and greenest Somatochlora species, with its south-eastern counterpart Somatochlora meridionalis. The commonest Somatochlora species in much of Europe. Often flies in deep shade over lowland waters, but in full sunshine at mountain lakes.
Total: 50-55 mm.
Abdomen: 37-44 mm.
Hindwing: 34-38 mm.
Various standing and slow-flowing waters such as ponds, oxbows, rocky lakeshores, moorland lakes, canals and sluggish rivers. Often favours same shading by trees and steep banks that suit oviposition, conditions found in woodland.
From late May to late September. Most abundant from June to August.