Raumnutzung des Libellen-Schmetterlingshafts nördlich der Alpen: Folgerungen für den Artenschutz
Spatial Use of the Owly Sulphur north of the Alps – Consequences
for species protection
Isolation of habitats remains one of the most severe threats to
biodiversity, and it is vital to enable exchange among habitat
islands by creating suitable stepping stones or connecting
The Owly Sulfur Libelloides coccajus has been heavily affected
by isolation north of the Alps since it depends on dry
and warm open forests and on grasslands which should not
be cut before early August. The study investigated flying habits
of this protected species in order to elucidate both its core
habitat and adjacent areas used for hunting and mating, with
special regard to obstacles.
The results revealed that wind protection seems to be one
of the prime requirements for L. coccajus, whereas land use
and thus vegetation type play a minor role, at least as far as
hunting is concerned. For instance, L. coccajus was frequently
observed to fly and hunt above corn fields and other crops.
Apparently, neither hedge rows nor crop fields seem to seriously
hamper the dispersal of L. coccajus.
This finding is very important for designing and creating
effective stepping stones and connecting corridors between
the remaining L. coccajus populations.