Seasonal Variation of Dragonflies Diversity in Muthupet Mangrove Forest, Tamil Nadu, India

The present study was aimed to examine the diversity and dominance of dragonfly in Muthupet mangrove forest in Thiruvarur District, Tamil Nadu was carried out for a period of one year from January 2014 to December 2014. Combine technique sampler (Core and Sweeping net) were used sampling of Odonata. Totally 8 species (Rhyothemis variegata, Anax guttatus, Pantala flavescens, Brachythemis contaminata, Orthetrum sabina, Diplacodes trivialis, Crocothemis servilia and Tramea basilaris) of Anisoptera (dragonflies) were recorded and all these species were grouped into two families. Libellulidae was the dominant family with 7 species followed by Aeshnidae family (1 species). Species diversity and abundance were maximum in the months of monsoon and dropped to the minimum in the months of summer.