Acrocephalidae (the marsh- and tree-warblers or acrocephalid warblers) is a family of oscine passerine birds, in the superfamily Sylvioidea.

The species in this family are usually rather large "warblers". Most are rather plain olivaceous brown above with much yellow to beige below. They are usually found in open woodland, reedbeds or tall grass. The family occurs mostly in southern to western Eurasia and surroundings, but also ranging far into Pacific, with some species in Africa. The genus limits are seriously in need of revision; either most species should be moved into Acrocephalus, or the latter should be split up. However there is insufficient knowledge as to how.

Genus Acrocephalus

Marsh-warblers. About 35 species; para- or polyphyletic.

• Moustached Warbler, Acrocephalus melanopogon
• Aquatic Warbler, Acrocephalus paludicola
• Sedge Warbler, Acrocephalus schoenobaenus
• Speckled Reed Warbler, Acrocephalus sorghophilus
• Black-browed Reed Warbler, Acrocephalus bistrigiceps
• Paddyfield Warbler, Acrocephalus agricola
• Manchurian Reed Warbler, Acrocephalus tangorum
• Blunt-winged Warbler, Acrocephalus concinens
• Eurasian Reed Warbler, Acrocephalus scirpaceus
  • Caspian Reed Warbler, Acrocephalus (scirpaceus) fuscus
  • Mangrove Reed Warbler, Acrocephalus (scirpaceus) avicenniae
• African Reed Warbler, Acrocephalus baeticatus
• Blyth's Reed Warbler, Acrocephalus dumetorum
• Marsh Warbler, Acrocephalus palustris
• Great Reed Warbler, Acrocephalus arundinaceus
• Oriental Reed Warbler, Acrocephalus orientalis
• Clamorous Reed Warbler, Acrocephalus stentoreus
• Large-billed Reed Warbler, Acrocephalus orinus
• Basra Reed Warbler, Acrocephalus griseldis
• Australian Reed Warbler, Acrocephalus australis
• Nightingale Reed Warbler, Acrocephalus luscinia
  • Aguiguan Nightingale Reed Warbler, Acrocephalus luscinia nijoi - doubtfully distinct; extinct (c.1997)
  • Astrolabe Nightingale Reed Warbler, Acrocephalus luscinia astrolabii - extinct (mid-19th century?)
  • Pagan Nightingale Reed Warbler, Acrocephalus luscinia yamashinae - doubtfully distinct; extinct (1970s)
• Carolinian Reed Warbler, Acrocephalus syrinx
• Nauru Reed Warbler, Acrocephalus rehsei
• Millerbird, Acrocephalus familiaris
  • Laysan Millerbird, Acrocephalus familiaris familiaris - extinct (late 1910s)
• Bokikokiko, Acrocephalus aequinoctialis
• Tahiti Reed Warbler, Acrocephalus caffer
  • Huahine Reed Warbler, Acrocephalus caffer garretti - extinct (19th century?)
  • Raiatea Reed Warbler, Acrocephalus caffer musae - extinct (19th century?)
• Tuamotu Reed Warbler, Acrocephalus atyphus
• Rimatara Reed Warbler, Acrocephalus rimatarae
• Pitcairn Reed Warbler, Acrocephalus vaughani
• Henderson Reed Warbler, Acrocephalus taiti
• Marquesan Reed Warbler, Acrocephalus mendanae
• Cook Reed Warbler, Acrocephalus kerearako
• Greater Swamp Warbler, Acrocephalus rufescens
• Cape Verde Warbler, Acrocephalus brevipennis
• Lesser Swamp Warbler, Acrocephalus gracilirostris
• Madagascar Swamp Warbler, Acrocephalus newtoni
• Rodrigues Warbler, Acrocephalus rodericanus
• Seychelles Warbler, Acrocephalus sechellensis

Genus Iduna

• Thick-billed Warbler, Iduna aedon
• Booted Warbler, Iduna caligata
• Sykes's Warbler, Iduna rama
• Eastern Olivaceous Warbler, Iduna pallida
• Western Olivaceous Warbler, Iduna opaca
• Dark-capped Yellow Warbler, Iduna natalensis
• Mountain Yellow Warbler, Iduna similis

Genus Hippolais

• Upcher's Warbler, Hippolais languida
• Olive-tree Warbler, Hippolais olivetorum
• Melodious Warbler, Hippolais polyglotta
• Icterine Warbler, Hippolais icterina

Genus Calamonastides

• Papyrus Yellow Warbler, Calamonastides gracilirostris

Genus Nesillas

Brush warblers. 5 living species, 1 recently extinct.

• Aldabra Brush Warbler, Nesillas aldabrana (extinct: c.1984)
• Anjouan Brush Warbler, Nesillas longicaudata
• Malagasy Brush Warbler, Nesillas typica
• Grand Comoro Brush Warbler, Nesillas brevicaudata
• Moheli Brush Warbler, Nesillas mariae
• Subdesert Brush Warbler, Nesillas lantzii

References

• Del Hoyo, J.; Elliot, A. & Christie D. (editors). (2006). Handbook of the Birds of the World Volume 11: Old World Flycatchers to Old World Warblers. Lynx Edicions. ISBN 84-96553-06-X.