Old World Warblers (Sylviidae)

Gansu Leaf-warbler (Phylloscopus kansuensis) - HBW 11, p. 658

French: Pouillot du Gansu German: Kansulaubsänger Spanish: Mosquitero de Gansu

Taxonomy: Phylloscopus proregulus kansuensis Meise, 1933, vicinity of Lauhukou, north Gansu province, China.
This taxon has usually been treated as a junior synonym of nominate race of P. proregulus or of P. chloronotus (which has similarly been lumped within that species). Recent studies, however, have indicated that it is distinct vocally and in habitat choice; in playback experiments, present species and P. chloronotus (of race forresti) responded little or not at all to each other’s song. Monotypic.

Distribution: Breeds in C China (E Qinghai, SW Gansu); non-breeding range unknown.