Greenhouse gas (GHG) budgets are uncertain in the Global South due to the scarcity of in-situ data. The effect of landscape variability on GHG budgets in the Sahel is particularly under-studied. To address this gap, we present in-situ measurements of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) fluxes from the Sahelian semi-arid savanna. Over the course of a year, we conducted chamber measurement campaigns across various landscape features, capturing the effects of both seasonality and landscape characteristics on GHG fluxes. The landscape features studied include: 1) tree branches and stems, 2) soils and herbaceous vegetation, 3) water ponds, and 4) grazing areas. Our key findings are: Trees emit N2O; stems emit CH4, while foliage acts as a CH4 sink. Proximity to trees influences soil CH4 emissions. Despite large spatial and temporal variation, mean CH4 fluxes are near zero, whereas N2O fluxes are almost always positive. Sparsely distributed ponds are significant sources of CH4. Grazing has no observable effect on the fluxes of any GHG. This study provides valuable insights into the complex dynamics of GHG exchange in semi-arid savanna landscapes. It emphasizes the importance of landscape features for improving GHG budget estimates and developing targeted climate mitigation strategies for vulnerable regions.