I didn't have peacocks but I tried guinea fowl -- supposed great for eating bugs from the place -- and I agree - noisy.
They took to perching on top of our house and you'd hear them non-stop - che-kook, che-kook, che-kook - 24/7.
I swore I was going to kill them and my wife re-homed them (I suspect that the people who came to get them put them right into the pot).
I'm quite happy with chickens and have been for 25+ years. Almost never see a tick; pretty sure they've eaten them, everyone else around here has ticks.