#$%^&*AU2016100151A420160317.pdf#####ABSTRACT A device for deterring birds, having rotatable structure rotatably mounted with respect to a mounting means, the rotatable structure having outwardly extending arms, each arm having a vane such that action of air flow on the vanes causes the rotatable structure to rotate wherein there are six said arms.1/4 2 2 26, 8 ~2 8 30 3D 830 0 12.-- 34 FIG. 1