Madagascar Swamp Warbler (Acrocephalus newtoni) [XC762571]
by Peter Boesman from Tsarasaotra park, Antananarivo, Madagascar (call, song)
Madagascar Swamp Warbler (Acrocephalus newtoni) [XC142952]
by Hans Matheve from Moramanga, Toamasina, 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).