Flying Monkeys are mechanical creatures the Wizard uses to spy on his subjects. They can record and play what they have seen.
In the works of L. Frank Baum
Winged monkeys had been made slaves to the Golden Cap by the curse of Princess Gayelette. They were to obey the owner of the Cap. The Wicked Witch of the West obtained the Cap and used the wnged monkeys to conquer the western part of Oz.
After the Witch was killed by Dorothy, the girl took the Cap and eventually used it to command the monkeys to transport her and her companions to the Emerald City.
Winged monkeys are playfull, even mischevious by nature.