Fig. 8. Results of analyses comparing spectral reflectances from dorsal or ventral
frog body regions, as discriminated from backgrounds by frog or bird visual
systems. All discriminations plotted here are for the `Green' illuminant, but
results were similar for all illuminants. Open bars, dorsal frog colors; solid
bars, ventral frog colors. (A) Frog visual systems, (B) bird visual
systems.