Birds are feathered, winged, two-legged, warm-blooded, egg-laying vertebrates. The fossil record indicates that birds emerged within the theropod dinosaurs during the Jurassic period, around 150 million years ago.
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Camp Cretaceous Hybrid Concepts -
Velocirapteryx -
Archaeopteryx -
Chicken -
Ichthyornis -
Brown Pelican -
Death Dodo -
Unidentified Cretaceous bird
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