Sometimes Burt makes this really loud clicking noise with his beak over and over. It sounds pretty much the same as when he is working on cracking a macadamia nut. The loud cracks/clicks change to the odd quieter pop type of sound sometimes too but it’s mostly loud cracking/clicking sounds. He makes these sounds as often as he beak grinds and also sometimes does both in the same chilling out session. Is this normal? Do other macaws do this too?