I showed up to the airport this morning to get out and do some approaches. The starlings had other plans. Found a boat load of nesting materials in the lower cowl of the bonanza. They got in through the cowl flaps as I had plug in the cowls. Its a real Pain in the keester and I'd like to prevent it in the future. I've seen those plastic owls and rubber snakes and those big yellow inflatable balls with black eyes and wonder if anyone has experience with any of them and if they work or not.