Niger Forest Tree Frog

Adult males measure 40–49 mm (1.6–1.9 in) and females 74–87 mm (2.9–3.4 in) in snout–vent length. The dorsum is brown, with darker transverse bars, or green. The tibia has 4–5 bars, and the feet are fully webbed. The iris is rusty red. The tympanum is rather large. The male advertisement call consists of single calls and has a "peculiar" acoustic quality. The call is similar to the call of Leptopelis notatus, and very similar to that of Leptopelis macrotis. However, the similarity of calls was refuted by Rödel and colleagues.

Leptopelis millsoni is an arboreal frog found in primary and secondary lowland rainforest, secondary growth, and palm plantations. It is typically found near large, slow-flowing watercourses; the males call from branches close to such streams. It does not survive in open, degraded habitats. If similar to other species of Leptopelis, it would lay eggs in a nest on the ground near water. It is a common species but its habitat is affected by habitat loss caused by agricultural expansion, logging, and human settlements. It occurs in a number of protected areas, including the Korup National Park in Cameroon.

== References ==

The specific name millsoni refers to Mr. Alvan Millson, assistant colonial secretary in Lagos and the collector the two female syntypes.