Guindy National park with its unique vegetation has recorded 99 butterfly species. Lycaenidae documented the highest number of species (31 species) followed by Nymphalidae (27 species) and Pieridae (19 species), Hesperiidae and Papilioniae (11 species). The butterfly status of presence and absence were recorded as Common (C), Occasional (O), Rare(R) and Very Rare (VR) where common species (43.4%) were higher followed by occasional (21.2%), Rare (19.2%) and very rare (16.2%). Climatic parameters with diversity of butterfly species were studied. The least number of species (1.81%) was recorded at minimum temperature (28˚C) while at maximum temperature (34˚C) 3.54% species were recorded. At average temperature (33˚C) maximum number of species (17.45%) was recorded. Decrease in species richness was noted at maximum amount of rainfall (194.2 mm - 261.15 mm) and minimum rainfall (0.1 mm - 17.6 mm). Moderate rainfall (73.08 mm) showed maximum species. Seven species of butterflies comes under schedule species according to Indian Wildlife (Protection) Act 1972.