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a genetic mutation known as erythrism, which suppresses the black pigment eumelanin and produces an excess of the red pigment phaeomelanin, causes these grasshoppers to turn a dangerously conspicuous pink (making rare the photographer who manages to photograph one). the combination of red hair and freckles in humans is thought to be a form of erythrism. photos by roeselien raimond, victoria hillman, marcus juvonen, tim parkinson