Separating Radde's and Dusky Warblers

!n the last few years, there seems to have been a general change of view on the ease of separation of Radde's Warbler Phylloscopus schwarzi and Dusky Warbler P. fuscatus. The first easily accessible text for field separation of these two species was the paper by Johns & Wallace (1972), but there was still considerable confusion until Madge (1987) refined the criteria. Since then, there seems to

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