Wing

A solitary, one winged creature called Wing is harassed by a group of oppressive crows due to being weak and different from them. He decides that he wants to overcome his disability and escape from the forest. He builds a catapult and a mechanical wing to accomplish this. When he launches himself away from the forest, the wing malfunctions, and he crashes into the territory of the crows.

Vimeo link
(thanks Cora)