A motion waterfowl decoy. The preferred embodiment has a pair of wings mounted to an axle such that the wings rotate with the axle. The wings' undersides are preferably lighter than their topsides. A pull cord is wound about the axle so that unwinding the cord will spin the axle and wings. As the wings rotate, their lighter underside is alternately displayed, creating a strobelike effect resembling wings flapping. A biasing device such as a length of rubber or latex tubing or a spring is attached to the axle. Rotating the axle by pulling the cord loads the biasing device. When the cord is released, the biasing device will unload, causing the axle and wings to rotate in the opposite direction and rewinding the pull cord about the axle. The decoy preferably floats, and can be used to disturb the water's surface in imitation of landing or feeding waterfowl.