evolutionary tree (IMAGE)
Caption
A simplified evolutionary tree showing where bright colors appear on birds and other living species from this study and where these colors may have appeared on their extinct relatives, including dinosaurs. Skin (shown in orange), and scales and beak keratin (yellow) could have been brightly pigmented in extinct groups, whereas feathers and claws would probably not have been. Areas without bright color are shown in gray.
Credit
Sarah Davis/ The University of Texas at Austin
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