Yoshiki Watabe's Japanese Phylloscopus warblers site

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English Name : Pallas's Leaf Warbler
Scientific Name : Phylloscopus proregulus

Japanese Name : Karafuto-mushikui

The first description of Pallas's Leaf Warbler was by Pallas in 1811 as Motacilla Proregulus.
The Committe for Check-List of Japanese Birds (2000) treated it as a polytypic species and described Pallas's Leaf Warbler that have been recorded in Japanes was P. p. proregulus. Many authors, however, treate non-nominate subspecies as full species and the Pallas's Leaf Warbler P. proregulus as a monotypic species (Dickinson 2003, del Hoyo et al. 2006, Rheindt 2006).
The first record of Pallas's Leaf Warbler for Japan was in April, 1967, Tsuno-shima, Yamaguchi Prefecture. It is rare in Japan, but recently recorded on the islands in the Sea of Japan almost annually. There is also some wintering records in main island, Honshu.

References
del Hoyo, J., Elliott, A. and Christie, D. (eds). 2006. Handbook of the Birds of the World vol.11. Old World Flycatchers to Old World Warblers. Lynx, Barcelona.
Dickinson, C. (ed.) 2003. The Howard and Moore Complete Checklist of the Birds of the World, 3rd edition. Christopher Helm, London.
The Committe for Check-List of Japanese Birds(ed.) 2000. Check-List of Japanese Birds sixth revised edition. Ornithological Society of Japan, Obihiro.
Rheindt, F. E. 2006. Split galore: the revolution in Asian leaf warbler systematics. BirdingASIA 5: 25-39.

1. 22 May 1996
Wajima-shi, Ishikawa Prefecture.

The both sides of the head are darker than yellow-browed Warbler and the yellow mediun crown stripe is distinct. The supercilium is broader and yellower in front of eye than yellow-browed Warbler. The superciliums of both sides join over the forehead, while Yellow-browed Warbler's superciliums are usually not join. The tips of greater and median coverts are yellowish.
2. 11 March 2000
Kawasaki-shi, Kanagawa Prefecture.

This individual wintered there. The body feathers don't moult yet, so, the head and mantle are grayish comparing above photo.
3. 11 March 2000
Kawasaki-shi, Kanagawa Prefecture.

The eye stipe is distinct and darker than yellow-browed Warbler.
The mandibles are mostly black. The base of lower mandible is pale, but it is difficult to confirm it in field.
4. 11 March 2000
Kawasaki-shi, Kanagawa Prefecture.

Only Pallas's Leaf Warbler have yellowish rump in Japanese Phylloscpus warblers.
The call is weak and short 'chui'. It is softer and shorter than Yellow-browed Warbler.

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inserted by FC2 system