So this is specifically about sulfur influencing color, because we knew environmental factors caused color change way before that. Flamingos, as someone else else pointed out, but also I learned about this moth on my anthro class who changed colors because of a coal operation nearby
bundaya t1_jdww8p0 wrote
Reply to Volcanic sulfur may make barn owls grow redder feathers. The findings are among the first evidence that environmental sources of sulfur — such as the soil — can influence the color of integument like fur or feathers. by MistWeaver80
So this is specifically about sulfur influencing color, because we knew environmental factors caused color change way before that. Flamingos, as someone else else pointed out, but also I learned about this moth on my anthro class who changed colors because of a coal operation nearby