[2][3] It is known from the Massif of Nanzergwa, its type locality in the Bururi Province of western Burundi, and from the Mahale Mountains National Park in eastern Tanzania.

[1][2] The specific name sulfureogularis is derived from the Latin sulfur that refers to the element that is yellow in color and gula meaning throat, in reference to the bright yellow throat in breeding males.

[3] The snout is pointed or more rounded, but always distinctly overhanging the lower jaw.

The tympanum is distinct, about three-quarters of the eye diameter; the supratympanic fold is weak.

It is threatened by habitat loss caused by agriculture, wood extraction, and expanding human settlements.