16. A vocal parrot could be a sign of an animal in stress.

Many birds, including parrots, parakeets, and cockatoos, spend a large amount of their day squawking, talking, screaming, and squeaking. These pretty bird sounds, including singing and even speaking your language, are the reasons many people adore these loyal birds. While these vocalizations, particularly those involving human speech, can be delightful to bird owners, excessive noises can also be a sign of stress (via Ranker).
Are you a bird owner? Please pay attention to these particular excessive noises. If you notice that your pet bird is incessantly talkative, try decreasing common stress causes. Some examples of common stressors for birds include excessive noise or light, boredom, or loneliness. It’s not stress that is causing excessive vocalization from your bird. It could be that you are inadvertently rewarding your pet for the action, so they think it’s okay. Parrots and other similar birds actually enjoy being reprimanded because it is a form of stimulation. With that being said, the best thing to do if you want to decrease screaming is to leave them alone. If none mentioned above works, you should check in with your veterinarian.