Hyacinth macaw
If you ever have the opportunity, I highly recommend this exercise: go into the woods or someplace where you can’t be heard (this is to keep you from being arrested) and scream at the top of your lung for 30 seconds. Just 30 seconds. You will find yourself needing a nap afterwards. It is a lot of work.
There are a million different reasons why a bird would choose to scream. But the one thing all screams have in common is that, somehow, it is beneficial to the bird. If ...