The Acrocephalidae (the reed warblers, marsh- and tree-warblers, or acrocephalid warblers) are a

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

of oscine passerine birds, in the superfamily Sylvioidea. The species in this family are usually rather large "

warbler Various Passeriformes (perching birds) are commonly referred to as warblers. They are not necessarily closely related to one another, but share some characteristics, such as being fairly small, vocal, and insectivorous. Sylvioid warblers Th ...

s". 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 Eurasia (, ) is the largest continental area on Earth, comprising all of Europe and Asia. Primarily in the Northern and Eastern Hemispheres, it spans from the British Isles and the Iberian Peninsula in the west to the Japanese archipelag ...

and surroundings, but also ranges far into the Pacific, with some species in Africa.

Genus '' Acrocephalus''

Marsh-warblers. About 42 species; para- or polyphyletic. * Moustached warbler, ''Acrocephalus melanopogon'' *

Aquatic warbler The aquatic warbler (''Acrocephalus paludicola'') is an Old World warbler in the genus '' Acrocephalus''. It breeds in temperate eastern Europe and western Asia, with an estimated population of 11,000-15,000 pairs. It is migratory, wintering ...

, ''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'' *

Common reed warbler The common reed warbler (''Acrocephalus scirpaceus'') is an Old World warbler in the genus '' Acrocephalus''. It breeds across Europe into the temperate western Palaearctic where it is migratory, wintering in sub-Saharan Africa. It is also a res ...

, ''Acrocephalus scirpaceus'' ** Caspian reed warbler, ''Acrocephalus (scirpaceus) fuscus'' ** Mangrove reed warbler, ''Acrocephalus (scirpaceus) avicenniae'' * Blyth's reed warbler, ''Acrocephalus dumetorum'' *

Marsh warbler The marsh warbler (''Acrocephalus palustris'') is an Old World warbler currently classified in the family Acrocephalidae. It breeds in temperate Europe and the western Palearctic and winters mainly in southeast Africa. It is notable for incorpora ...

, ''Acrocephalus palustris'' *

Great reed warbler The great reed warbler (''Acrocephalus arundinaceus'') is a Eurasian passerine in the genus '' Acrocephalus''. The genus name ''Acrocephalus'' is from Ancient Greek ''akros'', "highest", and ''kephale'', "head". It is possible that Naumann and N ...

, ''Acrocephalus arundinaceus'' *

Oriental reed warbler The Oriental reed warbler (''Acrocephalus orientalis'') is a passerine bird of eastern Asia belonging to the reed warbler genus '' Acrocephalus''. It was formerly classified as a subspecies of the great reed warbler (''A. arundinaceus'') of the ...

, ''Acrocephalus orientalis'' * Clamorous reed warbler, ''Acrocephalus stentoreus'' * Large-billed reed warbler, ''Acrocephalus orinus'' *

Basra reed warbler The Basra reed warbler (''Acrocephalus griseldis'') is a "warbler" of the genus '' Acrocephalus''. It is an endemic breeder in Southwestern Iran, East and southern Iraq, Kuwait, and Israel in extensive beds of papyrus and reeds. It is easily mis ...

, ''Acrocephalus griseldis'' * Australian reed warbler, ''Acrocephalus australis'' * ✝ Nightingale reed warbler, ''Acrocephalus luscinius'' * Saipan reed warbler, ''Acrocephalus hiwae'' * ✝

Aguiguan reed warbler The Aguiguan reed warbler or Aguijan reed warbler (''Acrocephalus nijoi'') was a bird that originally occurred on the Northern Mariana Island Aguigan. It is considered a subspecies of the nightingale reed warbler The nightingale reed warbler ( ...

, ''Acrocephalus nijoi'' – extinct (c.1997) * ✝

Mangareva reed warbler The Mangareva reed warbler or Astrolabe reed warbler (''Acrocephalus astrolabii'') is a presumed extinct songbird that existed on Mangareva in the Gambier Islands. It is known from only two specimens, and is believed to have gone extinct in the m ...

, ''Acrocephalus astrolabii'' – extinct (mid-19th century?) * ✝

Pagan reed warbler The Pagan reed warbler (''Acrocephalus yamashinae'') was sometimes considered a subspecies of the nightingale reed warbler. It originally occurred on Pagan Island Pagan is a volcanic island in the Marianas archipelago in the northwest Pacific ...

, ''Acrocephalus yamashinae'' extinct (1970s) * Caroline reed warbler, ''Acrocephalus syrinx'' * Nauru reed warbler, ''Acrocephalus rehsei'' *

Millerbird The millerbird (''Acrocephalus familiaris'') is a species of Old World warbler in the family Acrocephalidae endemic to the Hawaiian Islands. Taxonomy It has two subspecies, ''A. f. kingi'' and ''A f. familiaris''. The nominate subspecies, the ...

, ''Acrocephalus familiaris'' ** ✝ Laysan millerbird, ''Acrocephalus familiaris familiaris'' – extinct (late 1910s) * Bokikokiko, ''Acrocephalus aequinoctialis'' * Tahiti reed warbler, ''Acrocephalus caffer'' * Moorea reed warbler, ''Acrocephalus longirostris'' * ✝ Garrett's reed warbler, ''Acrocephalus garretti'' – extinct (19th century?) ** ✝Raiatea reed warbler, ''Acrocephalus caffer musae'' – extinct (19th century?) *

Tuamotu reed warbler The Tuamotu reed warbler (''Acrocephalus atyphus'') is a species of Old World warbler in the family Acrocephalidae. It is found only in French Polynesia )Territorial motto: ( en, "Great Tahiti of the Golden Haze") , anthem = , song_type = Re ...

, ''Acrocephalus atyphus'' *

Rimatara reed warbler The Rimatara reed warbler (''Acrocephalus rimitarae'')
is a species of

Pitcairn reed warbler, ''Acrocephalus vaughani'' * Henderson reed warbler, ''Acrocephalus taiti'' * Northern Marquesan reed warbler, ''Acrocephalus percernis'' * Southern Marquesan reed warbler, ''Acrocephalus mendanae'' *

Cook reed warbler The Cook reed warbler (''Acrocephalus kerearako'') or Cook Islands reed warbler, is a species of Old World warbler in the family Acrocephalidae. It is native to the southeastern Cook Islands. Its natural habitats are subtropical or tropical dry f ...

, ''Acrocephalus kerearako'' * Greater swamp warbler, ''Acrocephalus rufescens'' * Cape Verde warbler, ''Acrocephalus brevipennis'' *

Lesser swamp warbler The lesser swamp warbler or Cape reed warbler (''Acrocephalus gracilirostris'') is an Old World warbler in the genus '' Acrocephalus''. It is a resident breeder in Africa from the Democratic Republic of the Congo, the Chad and Ethiopia south t ...

, ''Acrocephalus gracilirostris'' *

Madagascar swamp warbler The Madagascar swamp warbler (''Acrocephalus newtoni'') is a species of Old World warbler in the family Acrocephalidae. It is found only in Madagascar. Its natural habitat is swamp A swamp is a forested wetland.Keddy, P.A. 2010. Wetland Ec ...

, ''Acrocephalus newtoni'' * Rodrigues warbler, ''Acrocephalus rodericanus'' * Seychelles warbler, ''Acrocephalus sechellensis''

Genus ''Arundinax''

Thick-billed warbler The thick-billed warbler (''Arundinax aedon'') breeds in the temperate east Palearctic, from south Siberia to west Mongolia. It is migratory, wintering in tropical South Asia and South-east Asia. It is a very rare vagrant to western Europe. Th ...

, ''Arundinax aedon''

Genus '' Iduna''

Booted warbler The booted warbler (''Iduna caligata'') is an Old World warbler in the tree warbler group. It was formerly considered to be conspecific with Sykes's warbler, but the two are now usually both afforded species status. Booted warbler itself breeds ...

, ''Iduna caligata'' *

Sykes's warbler Sykes's warbler (''Iduna rama'') is an Old World warbler in the tree warbler family. It was formerly considered a subspecies of the booted warbler, but is now considered a full species. Its breeding range (biology), range is from northeast Arabia ...

, ''Iduna rama'' *

Eastern olivaceous warbler The eastern olivaceous warbler (''Iduna pallida'') is a small passerine bird with drab plumage tones, that is native to the Old World. For the most part it breeds in southeastern Europe, the Middle East and adjacent western Asia, and winters in t ...

, ''Iduna pallida'' *

Western olivaceous warbler The western olivaceous warbler (''Iduna opaca''), also known as isabelline warbler, is a "warbler", formerly placed in the Old World warblers when these were a paraphyletic wastebin taxon. It is now considered a member of the acrocephaline warble ...

, ''Iduna opaca'' *

African yellow warbler The African yellow warbler (''Iduna natalensis''), also known as Natal yellow warbler, dark-capped yellow warbler or yellow flycatcher-warbler, is a species of Acrocephalidae warblers; formerly, these were placed in the paraphyletic "Old World wa ...

, ''Iduna natalensis'' *

Mountain yellow warbler The mountain yellow warbler or mountain flycatcher-warbler (''Iduna similis'') is a species of Acrocephalidae warbler; formerly, these were placed in the paraphyletic "Old World warblers". Range and habitat It is found in Burundi, DRC, Kenya, Mal ...

, ''Iduna similis''

Genus ''
Hippolais ''Hippolais'' is a genus of tree warbler in the family Acrocephalidae. It is sometimes associated with the genus '' Iduna''. The genus name ''Hippolais'' is from Ancient Greek ''hupolais'', as misspelt by Linnaeus. It referred to a small bird ...
''

Upcher's warbler Upcher's warbler (''Hippolais languida'') is an Old World warbler in the tree warbler genus ''Hippolais''. It breeds in an area from Turkey south and east to Pakistan. It is migratory, wintering in eastern Africa, from Eritrea and Somalia south t ...

, ''Hippolais languida'' *

Olive-tree warbler The olive-tree warbler (''Hippolais olivetorum'') is an Old World warbler in the tree warbler genus '' Hippolais''. It breeds in southeast Europe and the Near East. It is migratory, wintering in eastern and southern Africa, from Kenya south to ...

, ''Hippolais olivetorum'' *

Melodious warbler The melodious warbler (''Hippolais polyglotta'') is an Old World warbler in the tree warbler genus ''Hippolais''. It breeds in southwest Europe and northwest Africa. It is migratory, wintering in sub-Saharan Africa. This small passerine bi ...

, ''Hippolais polyglotta'' *

Icterine warbler The icterine warbler (''Hippolais icterina'') is an Old World warbler in the tree warbler genus ''Hippo

Genus '' Acrocephalus''

Genus ''Arundinax''

Genus '' Iduna''

Genus ''Hippolais ''Hippolais'' is a genus of tree warbler in the family Acrocephalidae. It is sometimes associated with the genus '' Iduna''. The genus name ''Hippolais'' is from Ancient Greek ''hupolais'', as misspelt by Linnaeus. It referred to a small bird ...''

Genus ''
Hippolais ''Hippolais'' is a genus of tree warbler in the family Acrocephalidae. It is sometimes associated with the genus '' Iduna''. The genus name ''Hippolais'' is from Ancient Greek ''hupolais'', as misspelt by Linnaeus. It referred to a small bird ...
''