This warbler is endemic to Grande Comore. Its head, back, and wings are olive-brown, with a narrow pale eyebrow. A Mount Karthala study found it selecting mature and planted forest and avoiding logged forest.
The head, upperparts, and wings are uniformly olive-brown, with a narrow buff eyebrow. The underside is buff-brown, while the chin and throat are paler.
On the southern and western slopes of Mount Karthala, a habitat-selection study found it preferring mature and planted forest and avoiding logged forest.
An extinction-risk assessment has not been added yet.