Sympecma fusca

The Common Winter Damsel looks very much like the Siberian Winter Damsel. However, the dark stripes on the thorax of S. fusca are straight: they have no bulge. Moreover, the dark streak on the thorax sides is wider than with S. paedisca.

Common Winter Damsel (Sympecma fusca) female
Sympecma fusca 2000 – 2019 (source: NDFF)