In previous installments, my friend Corwin Sullivan of the Institute of Vertebrate Paleontology and Paleoanthropology (IVPP) in Beijing, China and I covered the basics about everybody’s new favorite batwinged dino-pigeon Yi qi. In Part 1, we discussed what’s so special about it, and in Part 2, what we know about how it might have flown and why we don’t know more.

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