Territoriality in Libellula julia Uhler (Anisoptera: Libellulidae)

Territorial behaviour of L. julia was studied at a sphagnum bog pond near Sherbrooke, Quebec. Canada. Males defend a 10—25 m length of shoreline by flying at, and chasing, conspecific males. Feeding was not seen to occur in these territories. Females visit shoreline areas to oviposit in water under the overhanging vegetation and males attempt to mate with any females they encounter at the oviposition sites. Following brief, aerial copulation, females resume ovipositon and are guarded by the males who hover nearby and attempt to drive away conspecific males.