Figure 2. Diffusion probabilities of Glossina palpalis gambiensis released in Mali.

(Left) Observed cumulated probabilities of presence of all series of females (circles) and predicted probability distributions from an isotropic 2D random walk at various distances from the release points, and corresponding mortality (μ), mean square displacement (λ), and correlation coefficient between observed and predicted (R²) (bars). (Right) Probability of a fly to cross the watershed divide in function of its distance to the release point (the red area corresponds to the average distance between RP 3 and the respective traps placed in the Niger Basin).