Belongs within: Acrocephalidae.
The genus Acrocephalus includes the reed warblers, a cosmopolitan group of insectivorous birds generally found in marshy habitats. Most Acrocephalus species are brown in colour. However, phylogenetic analysis also indicates the inclusion in this group of the papyrus yellow warbler Chloropeta gracilirostris, a more brightly coloured species with olive-brown upper parts and a yellow underbelly.
Notable members of the genus include the great reed warbler Acrocephalus arundinaceus, the largest warbler species found in Europe, which breeds in temperate regions of the western Palaearctic and migrates to an overwintering range in southern Africa. The Oriental reed warbler A. orientalis of eastern Asia is similar in appearace to the great reed warbler but has a more streaked throat (Arlott & Perlo 2021).
Acrocephalus Naumann & Naumann 1811CC10 [incl. Calamoherpe Boie 1822B94, Tatare Lesson 1831B94; Calamoherpinae, Tatarinae]
| i. s.: A. hiwaeAP21
| A. lusciniusJT12
| A. percernisAP21
| A. rehseiJT12
| A. rodericanusJT12
| A. sorghophilusJT12
| A. syrinxJT12 [=A. luscinia syrinxMS55]
|--+--‘Chloropeta’ gracilirostrisBKB15
| `--+--A. schoenobaenusBKB15
| `--+--A. paludicolaBKB15
| `--+--A. bistrigicepsBKB15
| `--A. melanopogonBKB15
`--+--+--+--A. agricolaBKB15
| | `--+--A. concinensBKB15
| | `--A. tangorumBKB15
| `--+--+--A. dumetorumBKB15
| | `--A. orinusBKB15
| `--+--A. palustris (Bechstein 1811)BKB15, M02 [=Motacilla (Sylvia) palustrisM02]
| `--+--A. baeticatusBKB15
| `--+--A. avicenniaeBKB15
| `--A. scirpaceusBKB15
`--+--A. griseldisBKB15
`--+--+--+--A. newtoniBKB15
| | `--A. sechellensisBKB15 [=Bebrornis sechellensisJF06]
| `--+--A. gracilirostris (Hartlaub in Gurney 1864)BKB15, B93 [=Calamoherpe gracilirostrisB93]
| `--+--A. brevipennisBKB15
| `--A. rufescensBKB15
`--+--*A. arundinaceus (Linnaeus 1758)CC10, BKB15, M02 [=Turdus arundinaceusCC10]
| |--A. a. arundinaceusAE06
| `--A. a. zarudnyiAE06
`--+--A. orientalisBKB15
`--+--A. stentoreusBKB15
`--+--A. familiarisBKB15
| |--A. f. familiarisFP64
| `--A. f. kingiFP64
`--+--+--A. mendanaeBKB15
| `--+--A. aequinoctialisBKB15
| `--A. australis (Gould in Lewin 1838)BKB15, CC10 (see below for synonymy)
`--+--+--A. kerearakoBKB15
| `--A. rimitaraeBKB15
`--+--A. atyphusBKB15
`--+--A. cafferBKB15
`--+--A. taitiBKB15 [=A. vaughani taitiC98]
`--A. vaughaniBKB15
Acrocephalus australis (Gould in Lewin 1838)BKB15, CC10 [=Calamoherpe australisCC10, A. arundinaceus australisWS48, A. stentoreus australisS90; incl. C. longirostris Gould 1845WS48]
*Type species of generic name indicated
References
[AE06] Alström, P., P. G. P. Ericson, U. Olsson & P. Sundberg. 2006. Phylogeny and classification of the avian superfamily Sylvioidea. Molecular Phylogenetics and Evolution 38: 381–397.
[AP21] Arlott, N., & B. van Perlo. 2021. Collins Birds of the World. William Collins.
[B94] Bock, W. J. 1994. History and nomenclature of avian family-group names. Bulletin of the American Museum of Natural History 222: 1–281.
[B93] Brooke, R. K. 1993. Annotated catalogue of the Aves type specimens in the South African Museum. Annals of the South African Museum 102 (10): 327–349.
[BKB15] Burleigh, J. G., R. T. Kimball & E. L. Braun. 2015. Building the avian tree of life using a large-scale, sparse supermatrix. Molecular Phylogenetics and Evolution 84: 53–63.
[CC10] Checklist Committee (OSNZ). 2010. Checklist of the Birds of New Zealand, Norfolk and Macquarie Islands, and the Ross Dependency, Antarctica 4th ed. Ornithological Society of New Zealand and Te Papa Press: Wellington.
[C98] Cockburn, A. 1998. Evolution of helping behavior in cooperatively breeding birds. Annual Review of Ecology and Systematics 29: 141–177.
[FP64] Fisher, J., & R. T. Peterson. 1964. The World of Birds: A comprehensive guide to general ornithology. Macdonald: London.
[JT12] Jetz, W., G. H. Thomas, J. B. Joy, K. Hartmann & A. Ø. Mooers. 2012. The global diversity of birds in space and time. Nature 491: 444–448.
[JF06] Jønsson, K. A., & J. Fjeldså. 2006. A phylogenetic supertree of oscine passerine birds. Zoologica Scripta 35: 149–186.
[MS55] Mertens, R., & J. Steinbacher. 1955. Die im Senckenberg-Museum vorhandenen Arten ausgestorbener, aussterbender oder seltener Vögel. Senckenbergiana Biologica 36 (3–4): 241–265.
[M02] Mlíkovský, J. 2002. Cenozoic Birds of the World. Part 1: Europe. Ninox Press: Praha.
[S90] Storr, G. M. 1990. Birds of Shark Bay area, Western Australia. In: Berry, P. F., S. D. Bradshaw & B. R. Wilson (eds) Research in Shark Bay: Report of the France-Australe Bicentenary Expedition Committee pp. 299–311. Western Australian Museum.
[WS48] Whittell, H. M., & D. L. Serventy. 1948. A systematic list of the birds of Western Australia. Public Library, Museum and Art Gallery of Western Australia, Special Publication 1: 1–126.