Figure 4: Phenotypic variation in skin pigmentation of larval newts at week 5 of the experiment.

(A) Depigmentation induced by light microhabitat conditions, (B) over-pigmentation induced by dark microhabitat conditions, (C) microhabitat inversion: unpigmented larvae from light conditions are transferred to new dark conditions, and (D) microhabitat inversion: heavily pigmented larvae from dark conditions are transferred to new light conditions.