"Beak-Banging
A bird may often hammer his beak on a hard object, or on you. It almost looks like a pecking motion. This is beak-banging, and it is a common behavior for male cockatiels. Like the bat bird, it is a gesture of property ownership. Your bird may be saying "Whatever I'm hammering on is mine!" However, while the Bat Bird is seen in both male and female parrot, beak banging is a predominantly male behavior."
So far, Dooby owns a DVD, the telephone, his perch, a small part of my computer desk and my mug!

A bird may often hammer his beak on a hard object, or on you. It almost looks like a pecking motion. This is beak-banging, and it is a common behavior for male cockatiels. Like the bat bird, it is a gesture of property ownership. Your bird may be saying "Whatever I'm hammering on is mine!" However, while the Bat Bird is seen in both male and female parrot, beak banging is a predominantly male behavior."
So far, Dooby owns a DVD, the telephone, his perch, a small part of my computer desk and my mug!