Did you know that Birds are actually distant descendants of the Dinosaurs? That explains why Zu have teeth and tails. But Birds are basically descended from a small group of theropods like Archaeopteryx, and Raptors today like what we see as Eagles, Hawks, Falcons, Ospreys may have descended from Raptors like Velociraptor, Utahraptor, and possibly Deinonychus. So if Chocobo met a Deinonychus like the one in the photo below, you don't think they'd have communication issues?