The Kamchatka leaf warbler, Phylloscopus examinandus, is a diminutive and sprightly bird, a member of the leaf warbler family Phylloscopidae. This species, once grouped with the "Old World warbler" assemblage, shares close kinship with the Arctic warbler and the Japanese leaf warbler, though it is now recognized as a distinct species.
To identify the Kamchatka leaf warbler, one should look for its olive-green upperparts and pale underparts, which are characteristic of many leaf warblers. Its song and calls, as well as its breeding range, can also be helpful in distinguishing it from its relatives.
This warbler favors the leafy canopies of Kamchatka, Sakhalin, Hokkaido, and the Kurile Islands for breeding, where it flits about in search of sustenance.
The Kamchatka leaf warbler is a migratory bird, breeding in the northern reaches of the Pacific and migrating to warmer climes in Indonesia and the Philippines to overwinter.
The migratory patterns of the Kamchatka leaf warbler are a testament to its hardiness, traversing vast distances between its breeding and wintering grounds.
The IUCN Red List categorizes the Kamchatka leaf warbler as Least Concern, indicating that, for now, this species does not face immediate threats to its survival.