
Photo: (c) Wang.QG, some rights reserved (CC BY) · CC-BY (May be cropped or resized)
Phylloscopus proregulus
Diet
Adults, larvae and pupae of small insects, and spiders
Habitat
Breeds in mountain forests; cup nest in a tree or bush
Range
Breeds from southern Siberia east to northern Mongolia and north-east China; winters mainly in south China and adjacent Southeast Asia
Clutch size
4–6 eggs
Incubation period
12–13 days; chicks fledge at 12–14 days
Pallas's leaf warbler is one of the smallest Palearctic warblers, with a relatively large head and short tail. It has greenish upperparts and white underparts, a lemon-yellow rump and yellow double wingbars, eyebrows and central crown stripe. It breeds in mountain forests from southern Siberia east to northern Mongolia and north-east China (Wikipedia, general species account).
It is strongly migratory, wintering mainly in south China and adjacent Southeast Asia, though increasing numbers have been found in Europe in autumn in recent decades. It is insectivorous, picking items from leaves or catching prey in short flights or while hovering in bushes and trees. The female builds a cup nest in a tree or bush and incubates the four to six eggs, which hatch after 12–13 days; nesting is from June to July. The cached account does not describe its Indian range. SoIB 2023 lists it as a bird of uncertain migratory status in forest and plantation, without a priority category (Wikipedia, general species account; SoIB 2023).