Not quite. Birds, in general, appear to have evolved from a subset of theropods. They are in the same clade. https://evolution.berkeley.edu/evolibrary/article

Not quite. Birds, in general, appear to have evolved from a subset of theropods. They are in the same clade. https://evolution.berkeley.edu/evolibrary/article/evograms_06 https://evolution.berkeley.edu/evolibrary/article/evograms_0... https://blogs.scientificamerican.com/tetrapod-zoology/50-million-years-of-incredible-shrinking-theropod-dinosaurs/ https://blogs.scientificamerican.com/tetrapod-zoology/50-mil...