Abstract: A device for deterring birds from alighting onto an object, the device having a mounting adapted to be fixed to an object upon which birds may alight, a hub rotatably associated with the mounting, and at least one arm adapted to extend radially from said hub. The at least one arms each include an associated vane moveable between a storage position parallel to the associated arm and a working position moveable between angles generally perpendicular to the associated arm, certain of the vanes being wind driven in the working position to rotate the arms about the mount to deter birds from alighting upon an object. The device may also be folded such that the at least one arms are brought into a position adjacent to each other, the vanes thereof being moveable to the storage position when the device is folded to avoid damage thereto.