Odonata fauna of Khao Yai National Park and the adjacent regions in Thailand, Part II: updating information and citizen science

Larval and adult odonate surveys were conducted at 11 sites in Khao Yai National Park (KYNP) and adjacent areas during the rainy seasons (May–October) of 2023 and 2024, alongside a citizen science event in September 2023. A total of 106 Odonata species (61 Anisoptera, 45 Zygoptera) were recorded, increasing KYNP’s known odonate fauna from 142 to 147 species. Gomphidia kruegeri, Atratothemis reelsi, Copera chantaburii, Nannophyopsis clara, and Protosticta khaosoidaoensis are new records for KYNP. Epopthalmia vittata, Lestes decipiens, and Aciagrion paludense were updated following recent taxonomic assessments, resulting in A. paludense documented for the first time in Thailand. Larval sampling, supported by the integration of citizen science data, yielded records of over 40 species, including nine for which the larval stage still awaits description. This study established an updated baseline for odonate biodiversity in KYNP, emphasized the importance of larval-stage documentation, and validated the efficacy of combining professional surveys with citizen science. Future research should incorporate molecular barcoding, seasonal resampling, and continued habitatstratified surveys to monitor long-term biodiversity changes in response to climate variability.