Massenansammlung von Sumpfheidelibellen. Ergreifen der Weibchen frühmorgens, Flug zum Laichgewässer in Präkopula, Radbildung am Laichgewässer, Eiablage. Rückflug der einzelnen Tiere zu den Nachtquartieren. Mit Zeitdehnung.

The appearance in vast numbers of Sympetrum depressiusculum clearly illustrate the events of the day of this species. In the morning tandem formation takes place. Around midday the tandems arrive reproduction waters and lay eggs. After the separation the dragonflies search favourable places, were they spend the rest of the day by searching food. At this places the animals also spend the night. Slow-motion frames.