Preliminary observations on Odonata fauna of Daroji Sloth Bear Sanctuary, Ballari District, North Karnataka, India

摘要

The preliminary study was conduc ted from Februa ry 2011 to January 2012 at Daroji Sloth Bear Sanctuary, Hosept. The study revealed the occurrence of a total of 22 species of Odonates in 19 genera belonging to 5 families from the study area. Among them the order Anisoptera which includes dragonflies was predominated with 17 (76%) species, followed by the order Zygoptera which includes damselflies with 5 (24%) species. The family Libel- lulidae was found to be the most dominant by 13 species with high percentage composition i.e., 76% , followed by the family Coenagrionidae by 3 species with 40% of total odonates species recorded from the study area. The status based on the frequency of occurrence of shows that 8 (36%) were common, 5 (23%) were very common, 3 (14%) were occasional, 4 (18%) were rare and 2 (9%) were very rare. The study highlights the importance and also provides the baseline information on status and composition of Odonates at Daroji Sloth Bear Sanctuary, Ballari District of North Karnataka for research on their biology and the conservation.