The males have a body length of 69 to 78 mm, the females (with laying spine) 74 to 83 mm. The wingspan is 84 to 95 mm.
The thorax and abdomen are black with yellow markings, their eyes are green. The forehead is yellow and has a thick bar. The occipital triangle, which lies on the rear edge of the head between the eyes, is yellow. Segments S5 to S8 of the abdomen each have only one ring, S2 to S4 have two.
The male is waisted at abdominal segment S3 and broadens at S7 and S8.
The female is not waisted and has a spine that clearly protrudes over the abdomen.
It is a watercourse species that colonises areas close to springs, which are usually located in forests.
Literature:
- K.-D. Dijkstra, Libellen Europas, 2. Auflage, Haupt Verlag Bern 2021,ISBN 3-258-08219-6, S. 228 f
- K. Sternberg / R. Buchwald, Libellen Baden-Württembergs, Bd. 2, Ulmer Verlag Stuttgart 2000, ISBN 3-8001-3514-0, S. 173–190
- H. Wildermuth, A. Martens, Die Libellen Europas, Quelle & Meyer Wiebelsheim 2018, 3-494-01690-9, S. 506 ff
Websites:
- https://www.libellen.tv
- https://www.libellenschutz.ch
- https://www.libellenwissen.de
- https://www.waldschrat-online.de
