Copyright: Per Hoffmann Olsen

Cordulegaster bidentata (Selys, 1843)


  • English: Sombre Goldenring
  • German/Austrian: Gestreifte Quelljungfer
  • Danish:
  • Image: 1920x1080
  • Location: Austria, Niederösterreich, Ober-Danegg
  • Date: 29/07/2017
  • Copyright: Per Hoffmann Olsen
  • Camera: Canon EOS 50D
  • Lens: Sigma 150mm APO Macro


Identification Help

The root triangle on the backwings have 5 cells instead of 3, which could make it C. boltonii instead of C. bidentata. But according to this document there is about 3% possibility that it is the C. bidentata, when looking on the backwing cells alone. They do variate from 2 to 6 cells where 3 cells is the most common.


But before concluding that its a C. boltonii you have to look at two other characteristics of the C. boltonii, first: that the triangle behind the eyes is yellow instead of black like on the C. bidentata - here it seems to be black.

Second: The C. boltonii also has a weak very fine second set of yellow stripes on the abdomen - which seems to be missing here as well. 

So this must be the C. bidentata.

More information information on the C. boltonii here: (in German)


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