Family Reed-warblers (Acrocephalidae)

Least Concern

Madagascar Swamp-warbler (Acrocephalus newtoni)


French: Rousserolle de Newton German: Madagaskarrohrsänger Spanish: Carricero malgache

Calamoherpe newtoni


, 1863,

near Soamandrikazay, Madagascar


See A. gracilirostris. Recent molecular analysis found strong support for a sister relationship with A. sechellensis. Monotypic.



Descriptive notes

18 cm; 14·5–20·5 g. A medium-sized warbler with slender silhouette, long bill, relatively large feet and strong legs, a graduated tail and relatively short, rounded... read more


Song, mostly from within vegetation, a loud sequence of liquid, resonant, melodious low and high... read more


Various types of freshwater habitat, especially in areas of slow-moving and stagnant waters,... read more

Food and feeding

Mainly insects. Forages mostly in dense vegetation, preferring to move within reedbed from one vertical stalk to another. Flies little and... read more


Season May–Jan, peak Nov–Dec. Two nests described, each a deep cup of dry grasses and other herbaceous stems, dead bleached... read more


Probably sedentary.

Status and conservation

Not globally threatened. Widespread and sometimes locally common across much of Madagascar; less numerous in S of range.

Recommended citation

Dyrcz, A. (2019). Madagascar Swamp-warbler (Acrocephalus newtoni). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 21 April 2019).