Phylloscopus examinandus
The Kamchatka Leaf Warbler (Phylloscopus examinandus) is a petite yet robust Old World warbler belonging to the family Phylloscopidae, a species only recently distinguished from the more widespread Arctic Warbler (*P. borealis*). Averaging 11.5-13 cm in length and weighing 8-15 grams, its plumage is characterized by greenish-brown upperparts and pale yellowish-white underparts. Critical identification features include a prominent, long, yellowish supercilium, which starkly contrasts with a da...
This warbler primarily inhabits coniferous and mixed deciduous forests, including spruce, fir, birch, and alder woodlands, often found in subalpine and coastal areas. It can be observed from sea level up to elevations of approximately 1,500 meters during the breeding season.
Primarily insectivorous, feeding on a wide variety of small insects, larvae, and spiders, which it gleans from foliage and occasionally catches in brief aerial pursuits.
Kamchatka Leaf Warblers are highly active, diurnal insectivores, constantly flitting through the canopy and undergrowth with rapid movements. They employ an agile foraging strategy, gleaning insects and larvae from leaves and branches, often making short, aerial sallies to catch prey mid-flight. ...
The Kamchatka Leaf Warbler breeds extensively across the Kamchatka Peninsula, the Kuril Islands, Sakhalin Island, and parts of Hokkaido in northern Japan. Its breeding range also extends to isolated pockets in northern Honshu. During the non-breeding season, it undertakes an extensive southward m...
Least Concern
- It was only officially recognized as a distinct species from the Arctic Warbler (*Phylloscopus borealis*) in 2011, based on genetic and vocal differences. - Despite its small size, it undertakes an impressive long-distance migration, traveling thousands of kilometers between its breeding ground...