Survey of Reptile Diversity in Olokemeji Forest Reserve, Ogun State

Reptile diversity in Nigerian forest reserves is poorly documented relative to mammalian and avian fauna, representing a gap in biodiversity knowledge with implications for conservation planning. This study presents findings from a systematic herpetological survey conducted in Olokemeji Forest Reserve in Ogun State, within Nigeria's South West geopolitical zone. Field surveys were conducted using Visual Encounter Surveys (VES), pitfall traps, and cover board arrays across three habitat types within the reserve: dense forest interior, forest edge, and riparian zones. Surveys were conducted during the wet season to maximize detection probability. A total of 34 reptile species were recorded from 12 families, including eight species of gecko, five monitors, and several snake species of conservation note. The forest interior habitat supported the highest species richness, while agricultural areas adjacent to the reserve boundary harbored predominantly generalist and disturbance-tolerant species. The African python and Nile monitor were among the species most frequently encountered through market surveys in surrounding communities, suggesting ongoing harvest pressure. The study recommends targeted herpetological monitoring as part of the reserve's annual biodiversity assessment program and the development of species-specific management guidelines for the most heavily traded reptile taxa. Engagement with local markets to monitor wildlife trade remains a priority. These findings provide a current species inventory for Olokemeji Forest Reserve. Keywords: reptile diversity, herpetology, Olokemeji Forest Reserve, South West Nigeria, forest survey