The location where I photographed the Cordulegaster boltonii is also a habitat of the in Denmark relatively rare Orthetrum coerulescens.

There were quite a few of them, especially males each aggressively defending their own little territory. Nothing were holding them back from chasing off the much larger Cordulegaster boltonii.

I also saw a few females, most of them forming mating wheels with males.

New photos have been added to the gallery