The rotating-head scare owl does have an advantage over the fixed-head Great Horned Owl because the wind can make it appear more life-like, giving it a sense of movement even when it's mounted in place. While a moving head has a real advantage, the most important aspect of any of our owls is the large size. A big, threatening silhouette with piercing eyes is the menacing scare factor for a pest. If you use your owl decoy for birds, it’s best to reposition your rotating head owl daily, as critters like these will become acclimated to its presence if it sits still, even with a turning head.