Diversity and Faunal of Odonata Insects along the Coast of Sanjiao Lake in Hubei

To clarify the species diversity and faunal composition of Odonata insects along the coast of Sanjiao Lake, aimed to investigate the Odonata resources in 7 sample sections along the lake shore for 3 years using line transect surveys combined with netting and photography recording methods.The survey results show that: a total of 42 species (including 1 undetermined species) belonging to 2 suborders, 8 families, and 23 genera of Odonata were collected, among which35 were new records in Wuhan. Specifically, the Anisoptera suborder included 27 species belonging to 4 families and 16 genera, accounting for 69.57% of the total genera and 64.29% of the total species; the Zygoptera suborder included 15 species (including 1 undetermined species) belonging to 4 families and 7 genera, accounting for 30.43% of the total genera and 35.71% of the total species. Among all species, the Libellulidae family was the most abundant with 23 species, accounting for 54.76% of the total species, making it the dominant family; the Genus Sympetrum was the dominant genus with 8 species, accounting for 19.05% of the total species. Among the 42 Odonata species, 13 were dominant species, accounting for 30.95% of the total. From the perspective of the seasonal regularity of Odonata, summer is the optimal observation period for dragonflies in this area. The main characteristic of the Odonata faunal composition along the coast of Sanhu Lake is the dominance of the Palaearctic + Oriental distribution type, with 27 species accounting for 64.29% of the total. The Odonata species resources along the coast of Sanjiao Lake are relatively rich, and the abundant vegetation and unique aquatic environment in this area provide a suitable habitat for Odonata insects.