Pallas’s Leaf Warbler
Phylloscopus proregulus

– small passerine, smaller than a sparrow
– diurnal migrant, probably nocturnal too
– migrates singly, in small to medium (mixed) flocks


Pallas’s Leaf Warbler Phylloscopus proregulus
BIF1985, 30/05/2014, Dornod Aimag, Mongolia, Mathias Putze
– long and broad bicoloured supercilium and dark eye stripe
– distict pale crown-stripe
– whitish-yellow rump patch (missing in Yellow-browed and Hume’s Leaf Warbler)
– double wing bar, in spring pale tertial fringes usually are abraded

comparison species:
Yellow-browed Warbler
Hume’s Leaf Warbler
Firecrest

voice: is supposed to be non-vocal on migration – no reliable evidence about flight calls

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