40 
W. BICKERTON—BIRDS OBSERVED IN 1902. 
I am indebted to Mr, P. J. Barraud, of Bushey Heath, for the 
following interesting table 
Summer Migrants. 
Date of arrival 
Name. at Bushey Heath, 
1902. 
Average date of 
arrival during 
previous 8 years. 
Nightingale. 
Greater Whitethroat. 
Lesser Whitethroat . 
Blackcap Warbler . 
. „ 18 . 
,, 20 . 
,, 13 . 
. April 20 
. „ 24 
. „ 28 
. ,, 15 
Garden - Warhler.... 
,, 22 . 
. ,, 27 
Chiffchaff . 
Willow-Wren. 
Tree-Pipit . 
. • „ 1 ....... 
. „ io . 
,, 12 . 
. April 7 
. ,, 12 
Swallow . 
,, 13 . 
. ,, 16 
House-Martin. 
,, 25 . 
. ,, 30 
Swift . 
. May 19 . 
. May 6 
Wryneck. 
...... April 23 . 
.. April 13 
Cuckoo. 
. „ 13 . 
.. „ 17 
Prom this it will be seen that eight species ont of the thirteen 
arrived earlier, and four later, than the average date, and that the 
remaining species arrived exactly on the mean date. 
In conclusion, I desire to tender to all my correspondents and 
local recorders my sincere thanks for their kindness in sending 
their notes to me, and to express the hope that they will favour 
me in the same direction year by year. 
