Pallas’s Leaf Warbler

The Pallas’s Leaf Warbler (Phylloscopus proregulus), is a leaf warbler which breeds in southern Siberia, Mongolia and parts of Tibet and China. It is strongly migratory and winters in subtropical Asia. This bird also occurs as far as western Europe in late October and November, despite an 1800 mile distance from its natural breeding grounds. This is a bird of coniferous mountain woodlands.

This is one of the smallest warblers, and shares greenish upperparts and off-white underparts with typical leaf warblers. This bird, however, has prominent double wing bars, eyebrow and crown stripe, and a lemon-yellow rump.

Like most Old World warblers, this small passerine is insectivorous. This bird is not shy, but its arboreal life style makes it difficult to observe. It is constantly in motion, and often hovers briefly, like a kinglet. Its song is powerful and Canary-like. The nest is built in a tree.

This bird is named after the German zoologist Peter Simon Pallas.