https://www.futurity.org/bird-evolution-beak-ichthyornis-dispar-1748352/
Toothy beak bridges gap between dinosaurs and birds - Futurity
May 3, 2018 - The skull of a missing-link bird shows what beaks first looked like when they evolved and tells us more about how they formed.
dinosaurs and birdstoothybeakbridgesgap