All birds are dinosaurs, but birds aren't direct descendants of most non-avian dinosaurs. They split off from the rest of the theropods over 100 million years ago, so there was a really long time where they evolved next to each other. There's dinosaurs that became even more birdlike long after actual, flying birds in various ecological niches were already a thing, there's very birdlike dinosaurs that evolved into less birdlike dinosaurs like T. rex, which we now know to be definitely scaly and not feathery in parts where earlier tyrannosaurids had feathers.
Oh, interesting. But like, their last common ancestor was feathered or skinny? I.e. did dinosaurs lose feathers to get scaly, or did they get feathers to become bird-like?
All birds are dinosaurs, but birds aren't direct descendants of most non-avian dinosaurs. They split off from the rest of the theropods over 100 million years ago, so there was a really long time where they evolved next to each other. There's dinosaurs that became even more birdlike long after actual, flying birds in various ecological niches were already a thing, there's very birdlike dinosaurs that evolved into less birdlike dinosaurs like T. rex, which we now know to be definitely scaly and not feathery in parts where earlier tyrannosaurids had feathers.
Oh, interesting. But like, their last common ancestor was feathered or skinny? I.e. did dinosaurs lose feathers to get scaly, or did they get feathers to become bird-like?
Their last common ancestor was already feathered.
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