I have a Red-Bellied Parrot that is nearly one year old. Today, when he tried to fly a short distance (2-3 feet) to my shoulder (he was clipped about a month and a half ago), he made it and immediately started squawking in pain.
He kept picking at his left wing. I didn't exactly know what to do, so I calmed him down and set him back on his cage. This has happened twice, and I had him try to fly once more to confirm the problem.
It appears that his left wing hurts in flight. He is going through a molting stage I think, as many new feathers are coming in and an increasing number of feathers are on the ground. The wing doesn't bother him when he isn't flying, so this isn't an emergency.
It isn't broken; he can still move the wing and preen it. However I think that it could be a flight feather that's bothering him. There is no blood. Is it possible that he accidentally pulled it out halfway, but it's still attached? He has no history of feather plucking, but it is molting time for him.