Unless you are a pigeon.... then it is a bit daunting
pigeons don't like falcons or eagles much at all for some reason 
I used to live near 2 fairly big wineries and they used to get me to chase the cockatoo's away.... they smash the grapes and chew the vines.... now a days they have netting over the vines, but back then, I used to chase them off in my gyro... I fitted a car horn on my machine and that moved them... but, as I had a cb radio that had a PA setting, I had a Walkman (cassette) player and played the squark/cry of a Peregrine falcon and the cockatoos nearly shit themselves and all crashed into each other trying to get away
trouble was it did me out of a job, they found they didn't need the gyro after a while, they just put some speakers around the winery and played the tape 
Have a listen to these guys... especially the vid with the black screen.... up loud
