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Pallas's Warbler

Pallas's Warbler
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Sylviidae
Genus: Phylloscopus
Species: proregulus
Binomial name
Phylloscopus proregulus

The Pallas's Warbler, or Pallas's Leaf Warbler, Phylloscopus proregulus , is a leaf warbler which breeds in southern Siberia, Mongolia and parts of Tibet and China.

This is a bird of coniferous mountain woodlands. The nest is built in a tree. Like most Old World warblers, this small passerine is insectivorous.

There are three subspecies. The southern races, P. p. chloronotus and P. p. simlaensis, move to lower latitudes in winter, but the northern nominate P. p. proregulus is strongly migratory and winters in subtropical Asia.

This tiny warbler is prone to vagrancy as far as western Europe in late October and November, despite a 3000km distance from its breeding grounds. For example, this species occurs in late autumn in Great Britain regularly enough that it is not classified as rare there.

This is one of the smallest warblers, and shares greenish upperparts and off-white underparts with typical leaf warblers. However, this is a little jewel of a bird, with prominent double wing bars, supercilia and crown stripe, and a lemon-yellow rump.

This bird is not shy, although 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.



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