The regression of mass (g) on resting frequency (kHz) for male R. capensis (n = 153) from 11 populations. Colours represent the biome category of each population and shapes represent different populations. The key to the abbreviations of population names are given in Table 1.
Odendaal et al. BMC Evolutionary Biology 2014 14:60 doi:10.1186/1471-2148-14-60