International Science Community Association International Research Journal of Biological Sciences 15 1 2026 02 10 A primary checklist of the butterflies of Pawalgarh conservation reserve, Ramnagar, Nainital, India 8 16 EN Soumaya Boudjemaa 1 University Hospital Centre, Batna, Algeria and Medical faculty, University of Batna, Algeria Said Nadji 2 University Hospital Centre, Constantine, Algeria Chahrazed Rajai 3 University Hospital Centre, Batna, Algeria Hannen Benaldjia 4 University Hospital Centre, Batna, Algeria and Medical faculty, University of Batna, Algeria Berkahoum Alamir 5 National Toxicology Centre, Algeirs, Algeria . Bharati 1 Research Scholar, SSJDWSSS GPGC, Ranikhet, Almora, India Singh Rajkumar 2 Professor, Lal Bhadur Shastri GPGC, Halduchaur, Nainital, India Kumar Shankar 3 Research Scholar, SSJDWSSS GPGC, Ranikhet, Almora, India > Research Paper 2025 11 30 2026 02 10 The diversity of Butterflies in Pawalgarh Conservation Reserve (henceforth PCR), Ramnagar, Uttarakhand, India was studied with periodically filed exploration from April 2022 to August 2025. Nearly 93 butterfly species were recorded from 6 families in the PCR. The number of species recorded from the family Nymphalidae (48.38%) with highest followed by Lycaenidae (23.65%), Pieridae (15.05%), Hesperidae (10.75%), Papilionidae (8.60%) and least number of population was recorded from Riodinidae (2.15%). Copyright@ International Science Community Association