Summary of colour variables measured in the tetrahedral colour space for three analysed species.

For each species we present: mean hue span (hm), average saturation (mean ra), and overlap of convex hulls calculated as: volume_of_overlap/volume_of_smaller_hull (thus the value of 1 would indicate perfect inclusion of the smaller hull in the bigger one; see [24] for more details).Summary of colour variables measured in the tetrahedral colour space for three analysed species.