Kloss's leaf warbler 
(Phylloscopus ogilviegranti)

Kloss's leaf warbler (Phylloscopus ogilviegranti) is a leaf warbler found in Cambodia, China, Laos, Thailand, and Vietnam.

The name Phylloscopus combines the Ancient Greek phullon meaning "leaf" and skopos meaning "seeker" (from skopeo, "to watch").