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Bird name:

Pallas's Leaf Warbler

Phylloscopus proregulus




Old World Warblers (Sylviidae)





Euring 5

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Breeding Location:

Mountains, Forest, Woodlands

Breeding Type:


Egg Colour:

White, heavily spotted with dark brownish red and a bit of deep purple grey.

Number of Eggs:

4 - 7

Incubation Days:

11 - 14

Egg Incubator:


Nest Material:

A domed structure with side entrance, made of dry grasses, moss, rotten wood, plant fibre, and rootlets, lined with finer material.

Nest Location:

On ground, in or against tussock, mound, windfall debris, or among tree roots.




Pallas's Leaf Warbler: Small leaf warbler. Dark olive-green back and crown with orange-yellow median stripe and eyebrows. Black stripe through eye, pale crescent below eye. Grey-olive mottling on cheek, black, short bill. Underparts light grey, black wings with olive edging and two white wing bars. Looks very short-tailed and shows small, pale yellow rump patch when hovering. Sexes and ages similar. Very active and feeds by constantly moving through, fluttering, and briefly hovering in the vegetation.

Range and Habitat

Pallas's Leaf Warbler: Rare passage visitor to the UK, usually seen in the late autumn. Breeds in eastern and southern Siberia, northeastern China, and northern Mongolia. Winters in southeastern China as well as northern Thailand and Indochina. Found in coniferous forests on breeding grounds, various scrub and forest habitats on migration and in winter.

Breeding and Nesting

Pallas's Leaf Warbler: Preferred nesting habitat is coniferous mountain woodlands. Compact, partially domed nest is situated 2 to 13 metres up a tree, at outer ends of branches, or lower down and close to central trunk. Nest is built of moss, lichens, and wool, and lined with feathers and birch bark.

Foraging and Feeding

Pallas's Leaf Warbler Highly active in the tree canopy where it feeds mostly on insects.


Pallas's Leaf Warbler: Loud whistles and trills. Call is a soft, nasal "du-wee," also a soft "wseep" or "deeht."

Similar Species

Pallas's Leaf Warbler: Willow Warbler has a yellow throat and breast, a more narrow eyebrow and eyestripe, and lacks yellow wing stripes and rump patch. Yellow-browed Warbler has thinner eyebrow, a green rump, and is slightly larger.


Belly, undertail coverts, chest, flanks, and foreneck.

The crown is the top part of the birds head.
The area between the uppertail coverts and the back of the bird.
4 and 6 letter alpha codesX

The four letter common name alpha code is is derived from the first two letters of the common first name and the first two letters of common last name. The six letter species name alpha code is derived from the first three letters of the scientific name (genus) and the first three letters of the scientific name (species). See (1) below for the rules used to create the codes..

Four-letter (for English common names) and six-letter (for scientific names) species alpha codes were developed by Pyle and DeSante (2003, North American Bird-Bander 28:64-79) to reflect A.O.U. taxonomy and nomenclature (A.O.U. 1998) as modified by Supplements 42 (Auk 117:847-858, 2000) and 43 (Auk 119:897-906, 2002). The list has been updated by Pyle and DeSante to reflect changes reported by the A.O.U from 2003 through 2006.


The Integrated Taxonomic Information System (ITIS) was established in the mid-1990 s as a cooperative project among several federal agencies to improve and expand upon taxonomic data (known as the NODC Taxonomic Code) maintained by the National Oceanographic Data Center (NODC), National Oceanic and Atmospheric Administration (NOAA).

To find the ITIS page for a bird species go to the ITIS web site advanced search and report page at You can enter the TSN or the common name of the bird. It will return the ITIS page for that bird. Another way to obtain the ITIS page is to use the Google search engine. Enter the string ITIS followed by the taxonomic ID, for example "ITIS 178041" will return the page for the Allen's Hummingbird.

Parts of a Standing birdX
Head Feathers and MarkingsX
Parts of a Flying birdX