
Photo: Frank Vassen · CC BY 2.0
Phylloscopus inornatus
Rare visitor: recorded only occasionally in this country
Habitat
Nest built in dense vegetation, often at the base of a tree or old stump; in summer up to 2,440m, in winter up to 1,525m
Range
Breeds in the east Palearctic; winters mainly in tropical South and South-east Asia
Clutch size
2–4 eggs, occasionally more
Incubation period
11–14 days; chicks fledge at 12–13 days
Size
9.5–11cm
Weight
4–9g
The yellow-browed warbler is one of the smaller Old World warblers, 9.5 to 11cm long and weighing 4 to 9g, distinctly smaller than a chiffchaff. It has greenish upperparts and white underparts, prominent double wing bars formed by yellowish-white covert tips, yellow-margined tertials and a long yellow supercilium. It breeds in the east Palearctic, from just west of the Urals to eastern Siberia, Mongolia and north-east China (Wikipedia, general species account).
It is strongly migratory and winters mainly in tropical South and South-east Asia. It is not shy, but its arboreal life makes it hard to observe. The song is a high-pitched medley of whistles and the call a piercing, often two-syllable 'tseeweest'. The nest is in dense vegetation, often at the base of a tree or old stump, with two to four eggs hatching after 11 to 14 days.