A new feature to us (and apparently said by some to be diagnostic) is the possibility that the feathering along the lower edge of the eye is white (thus contrasting with the ear coverts) in Greenish Warbler and matches the colour of the ear coverts in Green Warbler. It is important that this is assessed in good light conditions so perhaps we can't look at it with any certainty using these photos. However it seems fair to say that our recent bird has feathering more concolourous with the ear coverts than the other two birds, but perhaps not to the extent expected in Green Warbler? The three photos below are full size so anyone out there who's interested can blow them up a bit bigger for a closer look. The lack of yellow in the wing bar seems to have no relevance as fresh Green Warblers on the Turkish Black Sea Coast can show white wingbars when fresh. Ultimately it seems that some extralimital, worn birds cannot be identified without DNA analysis or a sonogram.
We would be very interested if anyone out there knows about leg colour (which was surprisingly pale in this bird), or the patterning of white on the inner web of the outer tail feather which in this bird was as would be expected in Greenish Warbler.
The Bardsey Green(ish) Warbler (upper photo) clearly differs from our two other recent Greenish Warblers (middle photo 11 June 2010, lower photo 8 June 2012). (c) Richard Brown