Phylloscopus proregulus
The Pallas's Leaf Warbler (Phylloscopus proregulus) is an exceptionally small and energetic Old World warbler, belonging to the family Phylloscopidae. Measuring a mere 9-10 cm (3.5-4 in) in length and weighing just 6-7 grams, it is one of the smallest Palearctic warblers. Its plumage features olive-green upperparts and whitish underparts, but its most distinctive field marks are a bright yellow supercilium, a pale yellow-green crown stripe, two prominent yellowish wing bars, and a diagnostic ...
Breeds in dense, damp coniferous or mixed montane forests and taiga edges, typically at high elevations. Winters in broadleaf forests, scrub, and plantations, often at lower elevations.
Primarily insectivorous, feeding on small insects, spiders, larvae, and other invertebrates gleaned from foliage and branches, occasionally supplemented with berries in autumn.
Pallas's Leaf Warblers are hyperactive and restless birds, constantly flitting through foliage in search of insects, often flicking their wings and bobbing their tails. They forage primarily by gleaning insects and larvae from leaves and small branches, frequently hovering briefly to snatch prey ...
The Pallas's Leaf Warbler has an extensive breeding range across the central and eastern Palearctic, stretching from the Ural Mountains eastward through Siberia, Mongolia, northeastern China, and North Korea. It typically breeds in montane coniferous or mixed forests at elevations often exceeding...
Least Concern
- Pallas's Leaf Warbler is named after Peter Simon Pallas, a German zoologist and botanist who described many species during an expedition across Russia in the late 18th century. - It is one of the smallest Old World warblers, weighing about as much as two US dimes. - This tiny bird is famous for...