232 
MIGRATION OP BIRDS 
26. The White Throat ( Sylvia drier ea) is found as a 
breeding species from Scandinavia to the shores of the Mediter- 
ranean. They arrive in Europe in April, and leave in 
September. They are not a very common migrant to these 
parts, but odd birds may be met with between November 
and April. 
27. The Rock Thrush ( Monticola saxatilis) has occasion- 
ally been recorded from England ; but its breeding haunts 
are confined to Central and Eastern Europe, east to Siberia 
and China, and south to North-West Africa. During the 
winter it is one of the commonest migrants to these parts, 
arriving on the plains outside Nairobi about the second week 
of October and remaining there in more or less constant 
numbers up to April. 
28. The Common Wheatear ( Saxicola cenanthe). 
29. The Isabelline Wheatear ( Saxicola isabellince). 
30. The Greenland Wheatear ( Saxicola leucorhoea). 
The first species is common throughout Europe from March 
to October ; the second breeds on the Continent, but not in 
England ; both are common birds in this country between October 
and March, the Isabelline arriving first and moving off first. 
The third species, which breeds in Greenland, Labrador, 
and North-East America, has been recorded from East Africa, 
but it is doubtful. Such birds certainly agree with description 
of this form, also in size. 
31 . The Pied Chat (Saxicola 'pleschanka) is found in summer 
in .Southern Russia, Siberia, Tibet, and China. Fair numbers 
arrive here in September and remain till April. 
32. The Whinchat (Pratincola rubetra) breeds throughout 
temperate Europe, arriving during April and leaving in Sep- 
tember and October. The birds that arrive here first are 
young ; these arrive in September to be followed by adults 
and young throughout October. They begin to go north in 
March, but some remain till April. 
33. The Redstart (Buticilla 'phcenicurus) occurs in England 
and the Continent during the summer, it migrates south to 
North Africa, a few coming as far as East Africa. 
The only specimen I have seen or collected was shot in 
January. 
