High Quality Content by WIKIPEDIA articles! The Yellow-browed Warbler or Inornate Warbler (Phylloscopus inornatus) is a leaf warbler (family Phylloscopidae) which breeds in temperate Asia. THis warbler is strongly migratory and winters in tropical Southeast Asia. LIke most similar birds, it was formerly included in the "Old World warbler" assemblage. IT was formerly considered to comprise of three subspecies, but humei and mandellii are now split as a separate species (Hume's Leaf Warbler), leaving P. Inornatus monotypic. THe two sister species differ slightly but consistently in morphology, bioacoustics, and molecular characters.