Figure 4
From: Colour lightness of butterfly assemblages across North America and Europe
Colour lightness of dorsal and ventral sides of North American and European butterfly species. Boxplots are given for the dorsal and ventral colour lightness of all species combined and separately for four butterfly families. Colour lightness ranges from 0 (black) to 255 (white). Note that the dorsal side tends to be darker coloured than the ventral side in all families except for Pieridae.
