Looks like the Great Orme warbler is causing some debate with some observors questioning its true identity. In the field the whole jizz of the bird shouted 'Iccie' but questions are being asked over the primary projection. Svenson shows there is a wide range in the wing length of Icterine Warbler and the smallest is only 2 mm longer than the largest Melodious. Easy enough to see from the comfort of an arm chair..............................
BWP suggests lenght of exposed primaries should be greater than 50% length of exposed tertials. Running the ruler over the Great Orme bird and taking into account the drooped wing so measuring the tertials rather than the exposed secondaries you get the following:
Interesting?
Melodious warblers can show pale wing panels but rarely as extensive as this bird . The dark centred pale fringed tertials are also good for Icterine as are the pale fringes to the greater coverts.
A very educational bird and one who's identity is not as clear cut as it first seemed.