BRITISH WARBLERS
GEOGRAPHICAL DISTRIBUTION.
There are a few records of the occurrence of this eastern species in Great Britain, but only on migration, most of which come from Fair Isle. In Heligoland it has been obtained once, and from Italy there are two records. Its breeding ground extends from the valley of the Petchora and the Central Urals on the west, over Northern Siberia and the Altai Mountains to Lake Baikal on the east. In the Petchora Valley it has been found as far as 68° N. lat., and in the valley of the River Obi it is numerous. Southwards the bird is not uncommon in the Province of Perm, more especially in the neighbourhood of Ekaterinburg. Eastwards we find it inhabiting the whole of the valley of the Yenisei, but beyond this it becomes scarce and is unknown in Trans-Baikal. In parts of Southern Siberia it is not uncommon, and Turkestan seems to be visited to a large extent on migration. In winter it visits Baluchistan and India.
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