A Siberian species which is displaced westwards with a similar frequency to Radde’s Warbler (Cramp 1992). One at Strumble Head on 15 October 1988 (G.H. Rees et al.) was initially surprised in the open but quickly moved into dense cover and was only observed subsequently by using a car as a ‘hide’.
CRAMP, S. (ed.) 1977-1993. Handbook of the birds of Europe, the Middle East, and North Africa: the birds of the Western Palearctic. Oxford, Oxford University Press. 7 Vols.