BRITISH WARBLERS 
it is very numerous, also in the vicinity of the River Kama 
and its tributaries. It also occurs in the Provinces of Kasan, 
Viatka, Simbirsk, Samara, the northern parts of Orenburg, 
and we lose sight of it in the Ural Mountains and the Kirghiz 
Steppes. On migration it passes through Astrakan, Worometz, 
Orel, Tchernigov and Kiev. On the River Dnieper it is rare, 
but ib occurs near Odessa and on the Crimea. On _ the 
northern slopes of the Caucasus it is not uncommon, but in 
Trans-Caucasia it is apparently a rare visitor, specimens 
having been obtained near Tiflis. On the autumn migration 
it has been found on the River Amu Daria and as far east 
as Gilgit. 
Its winter range is an extensive one. We find it common 
in Somaliland and Abyssinia, rare on the White Nile, 
but again common in Nubia, Egypt, Tunis, Algeria and 
Morocco. In Spain it is numerous, also in parts of the 
Pyrenees and the Province of Savoie, and individuals some- 
times remain as far north as Normandy. A few are resident 
in Switzerland, but only in the neighbourhood of Geneva 
and in some of the more western parts. In Italy it is very 
common, more particularly in the south, and it also visits 
Corsica. In Greece and Corfu it is very plentiful, especially 
among the mountains in Attica, and we can trace it as far east 
as the south-western parts of Persia. | 
LIFE-HISTORY. 
This bird is probably the best known of all the Warblers 
that visit Great Britain, so well known that it may, perhaps, 
to many seem almost superfluous to attempt to add anything 
new relating to its habits. But it is, indeed, almost impossible 
to study systematically any species—in fact, any organism—no 
matter how common, without continually adding to our store 
of knowledge and noticing new facts; and such facts may 
lead to the solution of problems connected with the mystery 
of life and the greater mystery of development. 
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