If you happen to live in north Queensland Australia keep your eye out for anti-aircraft cows. I would suggest that you keep your helicopter high enough off the ground that the cows can’t reach you. If they manage to get a piece of your helicopter they just might bring it down. Have video showing a helicopter assisted cattle round up similar to what resulted in the cows revenge. Beware, it has a Mötley Crüe soundtrack which may or may not be to your tastes.