Incisivosaurus, meaning "incisor lizard" is possibly the derpiest entry on our list. With the head of a raptor, the teeth of a rabbit, the feet of a chicken and the jazz hands of a student production of Chicago, this turkey-sized hot mess was bombing around in the early Cretaceous Period. To further hammer home its weirdo credentials, it is thought that Incisivosaurus is actually a type of bird that forget how to fly and went around swallowing rocks (which you would have thought would be a contributing factor) - sort of like the dino equivalent of the kid who eats glue. This specimen is so weird, in fact, that some people even thought that it was some kind of early ape when it was first discovered, due to its uncharacteristically mammalian teeth. Maybe all the other dinosaurs just wore braces, who knows?
