Figure 3
From: Colour lightness of butterfly assemblages across North America and Europe
Scatterplots showing the correlation between average colour lightness of butterfly assemblages in North America and Europe and environmental variables. Colour lightness ranges from 0 (black) to 255 (white). Insolation and temperature were included to test for the putative thermoregulatory and UV protection function of insect colour lightness, and humidity was included to test for the putative pathogen protection function of insect colour lightness. Note that colour lightness increased with insolation and temperature and decreased with humidity in both North America and Europe.
