logos said:Key features making it a juv are the consistently fresh plumage with all scapulars showing even dark centres (adults have a variable number of dark patterned scaps which appear patchily distributed and have bold pale internal bars, never look evenly spotted like this bird), wing coverts look fresh with neat pale fringes except for the innermost greater and median coverts which have dark subterminal marks, tertials a similar pattern to the inermost coverts only pattern a little more extensive. On adult the coverts and tertials are either winter patterned (plain grey) or a few show a bold summer pattern of cinnamon and black bars but these are irregularly distributed.
Any adult that still had so much rufous on the neck would still show some barring on the belly.