Hyperolius baumanni is a species of frog in the family Hyperoliidae. It is known from the Akwapim-Togo Ranges along the border between Ghana and Togo and from central Ghana. Common name Baumann's reed frog has been coined for this species.
The specific name baumanni honours Ernst Baumann, a German zoologist (1863–1895) who worked at the German research station in Misahöhe , Togo—the type locality of this species.
Hyperolius baumanni is a medium-sized member of its genus, with males measuring 23–30 mm (0.91–1.18 in) and females about 31 mm (1.2 in) in snout–vent length. The dorsum is almost uniformly brown and bears a broad, light dorso-lateral stripe. The pupil is horizontal. Male advertisement call consists of a slow, coarse initial sound, followed by a long, accelerating series of clicks.
Hyperolius baumanni is very similar to Hyperolius picturatus, and is possibly an eastern subspecies of the latter. However, the two have differences in morphology (larger gular flap in H. baumanni ) and the advertisement call.
