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the new study analyzed color-imparting structures called melanosomes from an entire fossil of a single animal, a feat which enabled researchers to reveal rich color patterns of the entire animal.
The science establishing feather chemistry as indicative of true color is still new, so there hasn't been time to test every fossil with intact feathers out there. That will likely change soon, as other paleontologists apply these new techniques to isolate coloration chemicals in specimens worldwide.
originally posted by: swanne
a reply to: Badgered1
Is there some sort of law which prevents species from sharing similar colour patterns?
Given the ressemblance of grackles with crows, of black-headed chickadee with Blackpoll warbler, and of the blue grosbeak with the bluebird, I would say "no".