Grinding: Beak grinding is often a sign of contentment in birds and is heard most often as the bird falls asleep. It is characterized by the side-to-side sliding of one beak over the other. It is believed by some experts that birds grind their beaks to keep them in their best condition.
Why is my bird grinding her beak?
To answer your question, parrots grind their beak when they are fulfilled or tired. You shouldn't be worried when they do this. It is perfectly normal and means they are relaxed and happy. Researchers think they could also be doing this as a way to keep their beak trim.
How do you tell if your bird is bonded to you?
If your bird tends to reflect your actions or feelings, it can be a sign that he is bonded to you. A bonded bird may snooze on your shoulder when you are relaxed. He may head to his food dish when he sees you eating, or he may dance and sing along with you while you are enjoying your favorite song.