Jura Chou

The Jura Chou (ジュラ鳥) or Jurassic Bird is a creature developed by Dr. Indigo using the chemical SIQ for Shiki's plot to use monstrous creatures to attack East Blue to force the World Government to submit to him.

This creature resembles an archaeopteryx. His overall colour is green, while the feathers on its wings are multicolored. Its head is black, and doesn't seem to have flesh or feathers. For his giant size and flying capabilities, it can hunt enemies in the air easily.

It appears in One Piece Film: Strong World, when the creatures from the flying islands invade Merveille, one is seen invading Shiki's castle. Later, another one is seen trying to eat Luffy and Billy as they fight Shiki.