Madagascar Swamp Warbler (Acrocephalus newtoni) [XC697842]
by Ken Behrens from Lac Tsarasaotra, Madagascar (call)
Madagascar Swamp Warbler (Acrocephalus newtoni) [XC750065]
by Ken Behrens from Eulophiella, Madagascar (song)
Subspecies
No subspecies.
Genetic study suggests that this species may form a monophyletic clade with Greater Swamp-Warbler (Acrocephalus rufescens), Cape Verde Swamp-Warbler (Acrocephalus brevipennis), Lesser Swamp-Warbler (Acrocephalus gracilirostris), Rodrigues Warbler (Acrocephalus rodericanus) and Seychelles Warbler (Acrocephalus sechellensis). These are sometimes considered to comprise a separate genus, Calamocichla. Recent phylogenetic analysis found strong support for a sister relationship with Seychelles Warbler (Acrocephalus sechellensis).