2cy+ October. Rather difficult PC, but proven as adult by the presence of a retained/forgotten innermost PC. This feather is now >1 year old, heavily worn and bleached. Theoretically, if this feather could be specified as juvenile, the bird would be a 2cy autumn (and conversely, if the feather is a post-breeding one, the bird would be 3cy+). However, such assessment is indeed very difficult and risky. [CV52619]