Great discovery this season! 6 1/2' diameter "wind-wheels", 3-bladed, mast-mounted BIRD REPELLERS (from Gone With The Wind Kites - gwtw-kites.com) are working. Thought I'd try these decorative yard toys to frighten the robbin' robins and other featherzoid cherry bandits. Looking at 50-60% improvement in bing and royal anne harvest compared with last season. Other contributing items were 2 life-like owls mounted on 16' poles. This pair of hooters are magnificent repellers without a doubt. Appreciate any info on other bird frighteners that work...