The Flying Monkeys are a magical namesake race of flying monkeys with feathered wings of birds and they are the Wicked Witch of The West's lackeys from the 1939 film The Wizard of Oz.
Their goal is to kidnap Dorothy and her dog Toto. Nikko is their leader. They fly out of the wicked witch's castle outside. They tore Scarecrow's legs off and his chest apart and took the Tin Man's axe away. They fly very often, but they along with the Winkie Guards became reformed after the Wicked Witch's demise.
In the book version of the Wonderful Wizard of Oz, they are the brown monkey with white wings so that they can fly. They carry the Tin Thing and Dorothy along with her dog named Toto.
There is another species of Flying Monkeys known as Mobats who are one of the many supporting antagonists in the 2007 Sci-Fi Channel mini-series Tin Man.
They also appear in the TV show Once Upon A Time.