Family Leaf-warblers (Phylloscopidae)

Least Concern

Kamchatka Leaf-warbler (Phylloscopus examinandus)


French: Pouillot du Kamtchatka German: Kamtschatkalaubsänger Spanish: Mosquitero de Kamchatka

Phylloscopus borealis examinandus


, 1913,



Previously considered a synonym of P. xanthodryas (with that species treated as a race of P. borealis), but differs in its shorter wings (allow 1); less bright green upperparts (1); less bright yellow underparts (1); use of broadleaf vs evergreen forest (1); song with many more elements starting at a high pace (3); and more rattling than buzzy call note (at least 1). Differs from P. borealis in its slightly more greenish upperparts and slightly more yellowish underparts#R#R#R (collectively 1); marginally longer bill, tarsi and tail#R#R (ns); and clearly distinct song, involving same parameters as those distinguishing P. xanthodryas from P. borealis, namely longer duration of smallest repetitive phrase (3); fewer repeated phrases per strophe (3); higher number of elements in smallest repeated phrase (ns[3]); lower-pitched call note (ns[at least 1]). Monotypic.

What do (1) and (2) mean? Learn more about the scoring system.

NE Russia (Kamchatka), Sakhalin, Kuril Is and N Japan (Hokkaido); non-breeding records from Philippines S to Bali and Lesser Sundas#R.

Descriptive notes

13 cm; 9–13 g. Very like P. xanthodryas (which see) but slightly larger in size (difficult to gauge), and adult has olive-green of crown and upperparts somewhat less... read more


Song a rapid pulsating series of harsh, ringing notes, “t’treet’t’treet’t’treet’t’treet …”... read more


Breeds in broadleaf deciduous forest with thick undergrowth, mainly alongside rivers in lowlands;... read more

Food and feeding

Diet consists mostly of small insects and other small invertebrates; details little known, but likely to differ minimally, if at all, from... read more


Season late Jun to Aug; one brood, occasionally two. Mainly monogamous, but polygyny recorded occasionally. Details of territorial and pair... read more


Migratory. Spends non-breeding season in extreme SE Asia from Philippines S to Bali and Lesser... read more

Status and conservation

Not globally threatened (Least Concern). Locally common. Little information on densities; c. 109 pairs/km² in subarctic forest in Hokkaido. Population considered largely... read more

Recommended citation

del Hoyo, J., Collar, N. & Christie, D.A. (2019). Kamchatka Leaf-warbler (Phylloscopus examinandus). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 12 December 2019).