I am living with a feathered demon named Ember. He is in his twenties and I just squirted him with a water bottle. He is an African Grey Parrot and if you have never lived with one, then you have no concept of what hell sounds like. When they don't get exactly what they desire with great urgency, they make a certain noise. It is called the Grey Growl, and it follows the path from your ears to a place of pain on your spine and below. I have no description for this delightful music other than to mention that it flows about my house frequently. He is a great bird and a most entertaining little fellow, until his demands remain ignored.