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Fig. 6. Results of analyses comparing frog spectral reflectances within single
color morphs, as viewed by frog or bird visual systems. Each panel plots the
discriminability (in jnds; just-noticeable-differences) of spectral pairs,
each indicated by a dot, for color morphs indicated along the abscissa. Al,
Almirante; Ag, Aguacate; Ba, Bastimentos; Bo, Bocas; Ca, Cayo Agua; Cg,
Chiriqui Grande; Gu, Guabo; Po, Pope; Ra, Rambala; Rb, Robalo; Rd, Roldan
(Pelican Key); Sc, San Cristobal; Sh, Shepherd; So, Solarte; Uy, Uyama.
Results plotted here are for the `Green' illuminant, but similar results were
found for all illuminants. See also Table
2. (A) Frog spectral pairs, as seen by frog vision. (B) Frog
spectra compared to background spectra, as seen by frog vision. (C) Frog
spectral pairs, as seen by bird vision. (D) Frog spectra compared to
background spectra, as seen by bird vision. Note that there are many more
points in the panels for frogs vs. backgrounds, because each frog
color was compared to all background colors, not only to the few colors
present in any given frog color morph as in A and C.
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