The figure here is based on an adaptation of this model: DeVisser, M. H., Messina, J. P., Moore, N. J., Lusch, D. P., and Matima, J. 2010. A dynamic species distribution model of Glossina subgenus Morsitans: The identification of tsetse reservoirs and refugia. Ecosphere 1(1):1–21. doi: 10.1890/ES10-00006.1
Inspiration for a color palette can come from anywhere, Conan the Barbarian in this case.