
Photo: (c) Tomas Broucek, some rights reserved (CC BY) · CC BY 4.0
Phylloscopus collybita
Habitat
Open woodlands throughout northern and temperate Europe and the Palearctic
Range
Winters in southern and western Europe, southern Asia and north Africa
Incubation period
13–14 days (female)
The common chiffchaff is a common, widespread leaf warbler that breeds in open woodlands throughout northern and temperate Europe and the Palearctic. It is greenish-brown above and off-white below, and is named after its simple, repetitive 'chiff-chaff' song. The spring adult of the western nominate form has brown-washed dull green upperparts, off-white underparts yellowish on the flanks, and a short whitish supercilium. A diagnostic dip-then-sideways tail wag gives it the name 'tailwagger' in India (Wikipedia, general species account).
It is a migratory passerine wintering in southern and western Europe, southern Asia and north Africa. Eggs are incubated by the female for 13–14 days, and the newly fledged juvenile is browner above than the adult with yellow-white underparts. The source does not describe its status in China (Wikipedia, general species account).