Moustached Grass-Warbler

In Kidepo Valley NP in northern Uganda I got a partial photo of a moustached grass-warbler. There are five subspecies and I saw ssp. amauroura which is apparently found in all of Uganda, South Sudan, southwestern Ethiopia south to eastern DRC, western and central Tanzania and northern and central Zambia. Birds of the World notes 6,826 observations and 968 photos, which is pretty low. The nominate ssps is olive-brown above; tinged with rufous on the forehead, rump and uppertail coverts; white lores and face to chin; narrow black line below the eye; ear coverts streaked olive brown and buffy brown; black malar stripe; and so one. Ssps amauroura is slightly darker brown, less olive above than the nominate, the tail is blacker, and the ear-coverts have white shaft streaks. 

Illustration of the nominate ssp from Birds of the World.

Range map from Birds of the World.