Blyth’s Leaf Warbler

Blyth's Leaf Warbler
Blyth’s Leaf Warbler Phylloscopus reguloides assamensis, Dulong Gorge, Yunnan, China, elev. 2330 m (7,640 ft.), June. (Craig Brelsford)

In China, Blyth’s Leaf Warbler Phylloscopus reguloides assamensis breeds southeast Tibet to northern Yunnan, southern Sichuan, and eastern Guizhou. Nominate possibly in Ngari and Shigatse prefectures in Himalayan foothills of Tibet. ID & COMPARISON Very similar to Claudia’s Leaf Warbler P. claudiae and Hartert’s Leaf Warbler P. goodsoni, and perhaps not safely separable in field. May be distinguished from Claudia’s by darker green upperparts and by yellower crown-stripe, ear coverts, and underparts. Does not show persistent nuthatch-like behavior typical of Claudia’s. VOICE Very similar to Claudia’s. Call often ends with a clear whistled pit-chew-chee. — Craig Brelsford

THE LEAF WARBLERS OF CHINA

shanghaibirding.com has research on most members of Phylloscopus in China. Click any link below:

Wood Warbler Phylloscopus sibilatrix
Buff-barred Warbler P. pulcher
Ashy-throated Warbler P. maculipennis
Hume’s Leaf Warbler P. humei
Yellow-browed Warbler P. inornatus
Chinese Leaf Warbler P. yunnanensis
Lemon-rumped Warbler P. chloronotus
Sichuan Leaf Warbler P. forresti
Gansu Leaf Warbler P. kansuensis
Pallas’s Leaf Warbler P. proregulus
Yellow-streaked Warbler P. armandii
Radde’s Warbler P. schwarzi
Sulphur-bellied Warbler P. griseolus
Tickell’s Leaf Warbler P. affinis
Smoky Warbler P. fuligiventer
Dusky Warbler P. fuscatus
Buff-throated Warbler P. subaffinis
Willow Warbler P. trochilus
Mountain Chiffchaff P. sindianus
Common Chiffchaff P. collybita
Eastern Crowned Warbler P. coronatus
Ijima’s Leaf Warbler P. ijimae
White-spectacled Warbler P. intermedius
Grey-cheeked Warbler P. poliogenys
Green-crowned Warbler P. burkii
Grey-crowned Warbler P. tephrocephalus
Whistler’s Warbler P. whistleri
Bianchi’s Warbler P. valentini
Alström’s Warbler P. soror
Martens’s Warbler P. omeiensis
Two-barred Warbler P. plumbeitarsus
Greenish Warbler P. trochiloides
Emei Leaf Warbler P. emeiensis
Large-billed Leaf Warbler P. magnirostris
Sakhalin Leaf Warbler P. borealoides
Pale-legged Leaf Warbler P. tenellipes
Japanese Leaf Warbler P. xanthodryas
Kamchatka Leaf Warbler P. examinandus
Arctic Warbler P. borealis
Chestnut-crowned Warbler P. castaniceps
Limestone Leaf Warbler P. calciatilis
Sulphur-breasted Warbler P. ricketti
Yellow-vented Warbler P. cantator
Blyth’s Leaf Warbler P. reguloides
Claudia’s Leaf Warbler P. claudiae
Hartert’s Leaf Warbler P. goodsoni
Kloss’s Leaf Warbler P. ogilviegranti
Hainan Leaf Warbler P. hainanus
Davison’s Leaf Warbler P. davisoni
Grey-hooded Warbler P. xanthoschistos

RESOURCES ON LEAF WARBLERS

Use Per Alström’s 40-page presentation on the leaf warblers of China. The document is available in PDF and jpeg:

Presentation on the Identification of Leaf Warblers in China, by Per Alström (PDF version)

Presentation on the Identification of Leaf Warblers in China, by Per Alström (zip folder containing jpegs that can be synced like photos to one’s smartphone)

See also:

Complete species-level phylogeny of the leaf warbler (Aves: Phylloscopidae) radiation, by Per Alström et al.

ACKNOWLEDGEMENTS

Daniel Bengtsson served as chief ornithological consultant for Craig Brelsford’s Photographic Field Guide to the Birds of China, from which this species description is drawn.

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