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Metachrosis, met-a-krō′sis, n. colour-change, as of a chameleon.

The coloration in life is highly variable; much of the apparent variation is due to metachrosis, for individuals of Smilisca baudini are capable of undergoing drastic and rapid change in coloration.

The coloration in the living frogs is highly variable due to extreme metachrosis.

The most striking examples of metachrosis in Smilisca are found in the baudini group, in which the dorsal ground-color changes from green to tan; correlated with the change in ground-color may be a corresponding change in the dorsal markings, but the dorsal markings may change to the opposite color.

The degree of metachrosis is moderate.