Compared with the dull browns and greys typical of swamp-dwelling warblers, this warbler is brightly coloured. It shows an underbelly of rich yellow and olive-brown upper parts. Its song consists of melodious liquid warbling.[3]
Fregin, S., M. Haase, U. Olsson, and P. Alström. 2009. Multi-locus phylogeny of the family Acrocephalidae (Aves: Passeriformes) - the traditional taxonomy overthrown. Molecular Phylogenetics and Evolution 52: 866–878.