tony's right. don't turn on and off. it makes them skiddish. BUT make sure you're not waving the spotlight all over the place. try to aim it in one spot and like like tony also said, use the halo of the light. waving it side to side will spook them too. having a red lens helps a LOT. even if your lens on your spotlight is originally clear, you can spray paint the inside with metallic red krylon spray paint. i think it's the kind for metals, but it's super heat resistant. make sure if you do that tho, you spray paint the inside of the lens. good luck!