This project aims to generate updated, robust baseline data on the distribution, occupancy, and approximate density of the Bioko drill within the Ureca–Moka corridor, located in the southern sector of Bioko Island. This area lies within and around the Luba Crater Scientific Reserve, a Key Biodiversity Area that has experienced increasing hunting pressure following improved road access since 2015. The project will integrate non-invasive monitoring methods to assess how ecological and anthropogenic factors influence drill presence in this critical landscape.

Fieldwork will be conducted along a 20 km linear transect between the villages of Ureca and Moka, following an old hunting trail. Twenty camera traps will be deployed semi-randomly using QGIS, maintaining a minimum distance of 2 km between stations and prioritizing ecologically relevant features such as animal trails, fruiting trees, and water sources. Cameras will operate continuously from October to May and will be checked regularly to ensure data quality. In parallel, systematic transect walks will record direct and indirect signs of drill presence (tracks, feces, vocalizations, and sightings) as well as indicators of human pressure, including snares, hunting trails, and gunshots.

Data analysis will use single-season occupancy models to estimate detection probability and site occupancy in relation to environmental variables (e.g. altitude) and human disturbance. Camera trap encounter rates will also be used to estimate approximate density using Random Encounter Models. The results will identify priority areas for conservation and provide evidence-based recommendations for management actions.

Beyond data collection, the project will strengthen local capacity through training of INDEFOR-AP technicians and collaboration with local communities. Results will be shared with national authorities, universities, and the public, contributing to long-term conservation planning for one of Bioko’s most emblematic and threatened species.