Abstract: The rotary bird hanger 30 includes a turning gear 38 having on its upper surface a lock collar 42, with lock notches 50 formed at intervals about the lock collar 42. The non-rotatable hanger support 32 includes a cam lock 62 movably supported by the hanger support 32 and a lock pin 82 engagable with the lock notches 50 of the hanger turning gear 38. Cams 78 are positioned along the processing path for engaging the cam lock 62 and for releasing the lock pin 82 from a lock notch 50, thereby permitting the rotary bird hanger 30 to rotate with respect to the hanger support 32 such that the lock pin 82 can engage others of the lock notches 50 to secure the rotational movement of the hanger 30 until the cam lock 62 engages additional cams 78 along the processing path.