Pteranodon on display at the Natural History Museum of Los Angeles.
Pteranodon is a genus of pterosaurs from late Cretaceous North America that contains two known species (P. longiceps and P. sternbergi). It is extremely well represented, having over 1,000 identified fossil specimens.
Fossils range greatly in size. The full skeletal specimen shown above is placed next to the head of another, much larger specimen (bottom right).
Another fun tidbit about this specific specimen is that a shark tooth is lodged in one of its neck vertebrae! (This is unfortunately not labelled)