OF: THE ‘BIRDS MENTIONED 221 
singing, and comes down again suddenly to a twig. 
‘If disturbed from the nest it drops quietly into the 
‘surrounding greenery (some think it will then some- 
times simulate being wounded). Found: Widely dis- 
tributed. Is the commonest of the warblers. Migratory : 
Arrives early in April, leaves September to October. 
Some few may remain later. Food: Chiefly insects 
(taken in the air) and caterpillars, beetles, and also ripe 
fruits. Male and female: Alike. Nest: In April. 
Situated low, not more than 3 or 4 feet high generally, 
often in a wild rose bush or other bush, or in brambles 
and nettles. Open, cup-shaped. Made of: Dry grass, 
wool and lichen (of flimsy structure), lined with horse- 
hair. Second nests: One brood only yearly. Eggs: 
Dull greenish-white, speckled olive green and greenish- 
grey or light brown. Four or five. 
21. WILLOW WREN (OR WARBLER) 
(Pages 164-167) 
Phylloscopus trochilus. (Gr., phullon, leaf; and skopos, 
watcher. Gr., tvochilos, wren). Member of Warbler 
family. Plain plumage ; back and wings, yellowish (or 
pale olive) green, under parts yellowish-white.  Distin- 
guish chiffchaff, very similar. (The loud ‘ chiff chaff’ 
note of this latter bird in early spring cannot be mis- 
taken; it has been called the ‘saw sharpener’ from 
