Originally Posted by Muppit17
Can you explain why you have dismissed 'Caspian' Reed Warbler - A.s.fuscus, to me there are a number of features that don't quite fit a classic - overall rich colour, darkish edge to the supercilium, darkish bill.
No doubt someone better than me can read the wing formula from the picture - I always struggle
Itís clearly BRW, primary projection is half that of the overlying tertials, with the emargination on p3 falling well within the tertials. On fuscus the emargination would be well up the wing not unlike Reed/Marsh Warbler outside the tertial area.