An improved method of manufacturing a bird deterrent device comprising an elongate base (1) and a plurality of elongate rods (3) which occupies less space for transportation and storage purposes prior to installing for use. The improved method according to one embodiment comprising disposing the rods in a mould in a common place in spaced side by side relation and moulding the base around the rods to form a generally planar device. In another embodiment the base is formed with reception locations for the rods which are aligned to position the rods in a common plane substantially parallel to a mounting surface of the base on initial insertion. The rods are bent up subsequently. The base is configured to provide one or more offset rows of rods when bent. Also described is a novel construction of base (1) which has a plurality of through holes (9), for capturing location means (adhesive) for the device. Preferably the base has an elongate groove on the underside thereof interconnecting the through holes.
