Figure 13 in The evolution of Bolbites onitoides (Coleoptera: Scarabaeidae: Phanaeini): its phylogenetic significance, geographical polychromatism and the subspecies problem

Figure 13. Predicted areas of environmental suitability (temperature and precipitation) for the red (upper row) and blue (lower row) variants of Bolbites onitoides within the range of the species. Note that the area of suitable environmental conditions for each colour variant within the range of B. onitoides, particularly when precipitation is taken into account, corresponds largely to the actual range of each variant. Furthermore, these areas largely do not overlap with each other. Confirming our initial hypothesis, this result indicates that the differential distribution of the red and blue variants across the populations of B. onitoides is likely a response to varying environmental conditions.