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

<p>For each species we present: mean hue span (<i>h_m</i>), average saturation (mean <i>r_a</i>), and overlap of convex hulls calculated as: <i>volume_of_overlap</i>/<i>volume_of_smaller_hull</i> (thus the value of 1 would indicate perfect inclusion of the smaller hull in the bigger one; see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0106650#pone.0106650-Maia1" target="_blank">[24]</a> for more details).</p><p>Summary of colour variables measured in the tetrahedral colour space for three analysed species.