Etho-ökologische Untersuchungen an Lestes viridis (Vander Linden) (Zygoptera: Lestidae)

The rendezvous and opposition behaviour of L. viridis are described and the results of marking experiments are reported. The 66 have sexual appetence with territorial character. At 12 a.m. they occupy perch sites on tall trees, growing parallel to a pond’s edge. They show a strong preference for the upper parts of the trees, when they occupy and defend vertical territories which have a half globular shape (diameter 1.5-0.4 m; density dependent). The perch sites form a bar to 99 flying from assembling places in the near wood to the pond. During opposition accompanying 66 defend 99 from mating interference by other 66. The recapture rate of marked 66 was 56%, that of marked 99 16% (within a distance of 120 m from the release place). 37% of marked 66 and 10% of marked 99 were recorded at a distance of 5 m from the release point (recapture dates 1-43 days after marking). Some details of opposition are given.