ORNITHOLOGICAL NOTES FROM A SOUTH LONDON SUBURB. 
the wind is E. or N.E. are often so exhausted as to be caught 
by hand, and are almost invariably difficult to flush, would seem 
to indicate that these are tired members of flocks which had 
been proceeding W. to whom a change of wind to E. had 
proved detrimental instead of helpful. 
October, 1908—about the poorest for records of visible 
migration of any year-—provides strong evidence in favour 
of the above theory. The wind, except for three days, was 
chiefly easterly throughout the month, yet, although the mi- 
grants appeared as usual in their customary haunts, on the few 
occasions that I witnessed any passage the wind was S.W. 
In short, whether my contention holds good for all parts 
of Great Britain or not, the solid fact remains that during all 
these years I have mever yet in E. and S.E. England witnessed 
a sustained passage unless the wind was in the N.W. to S.W. 
quarter. 
TRAVELLERS BY NIGHT. 
The mass of migrants presumably crosses the sea by 
mght or early morning, for not only are they to be found in 
plenty some morning “where the day before there were none, 
but the trained ear of the Naturalist will often after dark 
detect the notes not only of the clear-voiced waders, but also 
the. softer utterances of Redwings, Larks, etc. Still more 
forcible evidence of night travel comes to us from the light- 
houses, around which the keepers frequently report an extra- 
ordinary and bewildering collection of light-attracted birds, 
comprising sometimes both land and water species. 
HOURS OF DAYLIGHT MIGRATION. 
So far as daylight migration is concerned, it will be found 
that when a passage occurs scarcely a flock will be observed 
before 7.30 a.m., and as a rule the movement for the day will 
be over by 10.30 or so. In extraordinary “rushes,” however, 
the flocks, although at longer intervals than in the earlier part 
of the day, will continue to pass until 2, 3, and even 4 p.m. 
Assuming that these birds have been travelling all night, it 
is not easily understood why they should not appear with the 
earliest dawn, and yet a simple explanation may be that as 
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