A large, flying bird of the Dinosaur Age. It was known for its practice of swooping down over a patch of marijuana, grabbing some, flying to the nearest sulfur vent, and dropping it in and getting high off the marijuana fumes.
Guy #1: Dude today in history class we were learning about dinosaurs and someone asked if they got high. Then the teacher started telling us about the famed hippydactal.
Guy #2: Sweeeeeet!!!!