I can think of no way in which the parrot or what the parrot says can come into evidence. Obviously, the parrot can't testify. And I cannot think of a way in which the "statement" can be admitted, as there really isn't a way to demonstrate the reliability of the bird to accurately recall and repeat what it heard. With scent dogs, the certification process deonstrates the reliability of the dog, and even then the dog indicating on the scent is not considered proof, but rather an indication. The en scent indication amounts to probable cause, and will justify a search, but the indication alone does not amount to proof of guilt, which is what would happen if the bird "testified."