The Flying Mouths are minor antagonists in the Annoying Orange episode Orcrux - 1 Whistling Pinwheel. They are mouths with wings and fangs that guard the Whistling Pinwheel Orcrux on top of Whistler Mountain alongside Saw Blade Pinwheels. The mouths do not attack Orange, Pear and Grapefruit directly, but they do annoy the three fruits with constant whistling, until Orange blows them up with TNT.
Annoying Orange Wiki