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Are you looking for vestigial? I would be inclined to agree with you, except that birds have tetrachromatic vision (as opposed to our trichromatic vision), and
by rhombocombus 9y ago
Are you looking for vestigial? I would be inclined to agree with you, except that birds have tetrachromatic vision (as opposed to our trichromatic vision), and it is possible that the beak coloration is visible after all.
- oculusthrift 9y agoi think it’s genetic drift
- rhombocombus 9y agoI think you're right, but after learning about the birds' fourth photopigment, I think this is probably regular evolution at work and there is some selective advantage to it since they can (probably) see the colors in some capacity.