Phylloscopus orientalis
The Eastern Bonelli's Warbler (Phylloscopus orientalis) is a petite and unassuming Old World warbler, measuring roughly 11-12 cm in length with a wingspan of 17-20 cm and weighing a mere 7-9 grams. Its plumage is characterized by plain olive-green upperparts and clean whitish underparts, subtly washed with pale yellowish on the flanks and undertail coverts, while a striking pale supercilium accentuates its dark eye. A key diagnostic feature, especially in flight, is its bright yellowish rump,...
This warbler favors dry, open deciduous or mixed woodlands, scrub, garrigue, olive groves, and orchards, typically found at low to mid-elevations up to 2,000 meters.
Its diet consists almost exclusively of small insects and spiders, gleaned from leaves and branches, or captured in flight. Occasionally, it may consume small berries during migration.
Eastern Bonelli's Warblers are primarily diurnal, actively foraging for insects among foliage or making short, acrobatic sallies to catch prey in mid-air. Males are highly territorial during the breeding season, establishing and defending their domains with persistent singing and occasional aggre...
The Eastern Bonelli's Warbler breeds predominantly across Southeastern Europe, including the Balkan Peninsula (from Croatia and Bosnia-Herzegovina eastwards), Greece, Bulgaria, Turkey, and extends into the Levant region such as Syria, Lebanon, and Israel. Its breeding range also reaches eastwards...
Least Concern
- The Eastern Bonelli's Warbler was only officially recognized as a distinct species from the Western Bonelli's Warbler (Phylloscopus bonelli) in 1993, based largely on significant differences in their songs and genetics. - Despite its tiny size, it undertakes an arduous long-distance migration, ...