Common reed warbler explained

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 resident species over large parts of Africa.

Taxonomy

The common reed warbler was formally described in 1804 by the French naturalist Johann Hermann under the binomial name Turdus scirpaceus.^[1] The type locality is Alsace.^[2] The common reed warbler is now one of around 40 species placed in the genus Acrocephalus that was introduced by Johann Andreas Naumann and his son Johann Friedrich Naumann in 1811.^[3] The genus name Acrocephalus is from Ancient Greek akros, "highest", and kephale, "head". It is possible that the Naumanns thought akros meant "sharp-pointed". The specific scirpaceus is from Latin and means "reed".^[4]

Ten subspecies are recognised:^[3]

• A. s. scirpaceus (Hermann, 1804) – breeds in Europe to west Russia, Ukraine and west Turkey, northwest Africa, winters in west, central Africa
• A. s. fuscus (Hemprich & Ehrenberg, 1833) – breeds in north Egypt and central Turkey through the Middle East to southeast European Russia, north Iran, Kazakhstan and northwest China; winters in eastern and southern Africa
• A. s. avicenniae Ash, Pearson, DJ, Nikolaus & Colston, 1989 – coasts of the Red Sea^{[5] [6]}
• A. s. ammon Hering, Winkler & Steinheimer, 2016 – Oases along the Libya-Egypt border region^[7]
• A. s. ambiguus (Brehm, AE, 1857) – Iberian Peninsula and northwest Africa
• A. s. minor Lynes, 1923 – Sahel region from Senegal to west-central Sudan (Darfur)
• A. s. cinnamomeus Reichenow, 1908 – west Ethiopia and south Somalia south through South Sudan, Uganda, Kenya, Zambia and Mozambique; patchy distribution in west Africa from south Cameroon to possibly Niger and Mali
• A. s. suahelicus Grote, 1926 – east Tanzania to east Mozambique and eastern South Africa
• A. s. hallae White, CMN, 1960 – southwest Angola to southwest Zambia and south to western South Africa
• A. s. baeticatus (Vieillot, 1817) – north Botswana and Zimbabwe to southern South Africa^[8]

An older scientific name for the reed warbler was Acrocephalus streperus (Vieill.).^[9]

The mostly resident Iberian and African subspecies are sometimes treated as a separate species, the African reed warbler (Acrocephalus baeticatus).^{[3] [10] [11]}

Description

This is a medium-sized warbler, in length with a wing-span of . The adult has an unstreaked brown back and buff underparts. The forehead is flattened, and the bill is strong and pointed. The sexes are identical, as with most warblers, but young birds are richer buff below. The common reed warbler looks similar to the great reed warbler, but the great reed warbler is larger in size and has a stronger supercilium.

The song is a slow, chattering jit-jit-jit with typically acrocephaline whistles and mimicry added.

Distribution and habitat

This small passerine bird is a species found almost exclusively in reed beds, usually with some bushes. They can also be found in damp scrub.^[12]

Behaviour and ecology

Food and feeding

Like most warblers, it is insectivorous, but will occasionally take plant material such as berries.

Breeding

The males return to the breeding grounds two or three weeks before the females. The species is usually monogamous. The first eggs are laid at the end of April. The nest is usually placed in vegetation over water, especially in reeds of the genus Phragmites. The deep cylindrical cup nest is sited on average —range is between —above the surface of the water and is built entirely by the female. She takes four days to build the initial cup of grass, reed stems and leaves, and another three days to complete the lining of finer material including hair. The clutch contains three to five eggs that are laid daily. The eggs are very pale green with speckles and blotches of olive green or grey. On average they measure and weigh . They are incubated by both parents, beginning after the penultimate egg is laid. Only the female incubates at night. The eggs hatch after 9–12 days. The nestlings are fed and cared for by both parents. They fledge after 10–12 days but continue to be fed by their parents for another 10–14 days. Up to one third of pairs raise a second brood.

The common reed warbler is one of the species that are brood parasitised by the common cuckoo.^[13]

Sources

• Book: Cramp . Stanley . etal . Stanley Cramp . 1992 . Acrocephalus scirpaceus Reed Warbler . Handbook of the Birds of Europe the Middle East and North Africa. The Birds of the Western Palearctic . VI: Warblers . Oxford . Oxford University Press . 193–212 . 978-0-19-857509-2 .

External links

• Eurasian reed warbler videos, photos & sounds on the Internet Bird Collection
• Avibase
• Ageing and sexing (PDF; 2.3 MB) by Javier Blasco-Zumeta & Gerd-Michael Heinze

Bibliography

• Kishkinev, D., Chernetsov, N., Pakhomov, A., Heyers, D., and Mouritsen, H. (2015). Eurasian reed warblers compensate for virtual magnetic displacement. Curr. Biol. 25, R822–R824

Notes and References

1. Book: Hermann, Johann . Johann Hermann . 1804 . Observationes zoologicae quibus novae complures, aliaeque animalium species describuntur et illustrantur . Latin . Argentorati [Strasbourg] . Amandum Koenig . 202–203 .
2. Book: Mayr . Ernst . Ernst Mayr . Cottrell . G. William . 1986 . Check-list of Birds of the World . 11 . Museum of Comparative Zoology . Cambridge, Massachusetts . 62 .
3. Web site: Gill . Frank . Frank Gill (ornithologist) . Donsker . David . Rasmussen . Pamela . Pamela Rasmussen . January 2022 . Bushtits, leaf warblers, reed warblers . IOC World Bird List Version 12.1 . International Ornithologists' Union . 12 June 2022 .
4. Book: Jobling, James A. . 2010. The Helm Dictionary of Scientific Bird Names . Christopher Helm . London . 978-1-4081-2501-4 . 30–31, 350.
5. Ash . J.S. . Pearson . D.J. . Nikolaus . G. . Colston . P.R. . 1989 . The mangrove reed warblers of the Red Sea and Gulf of Aden coasts, with description of a new subspecies of the African Reed Warbler Acrocephalus baeticatus . Bulletin of the British Ornithologists' Club . 109 . 36–43 .
6. Babbington . J. . Boland . C. . Kirwan . G.M. . Alsuhaibany . A. . Shirihai . H. . Schweizer . M. . 2019 . Confirmation of Acrocephalus scirpaceus avicenniae (Aves: Acrocephalidae) from mangroves on the Red Sea coast near Jazan, southwest Saudi Arabia . Zoology in the Middle East . 65 . 3 . 201–207 . 10.1080/09397140.2019.1604470. 155777594 .
7. Hering . J. . Winkler . H. . Steinheimer . F.D. . 2016 . A new subspecies of Eurasian Reed Warbler Acrocephalus scirpaceus in Egypt . Bulletin of the British Ornithologists' Club . 136 . 101–128 .
8. Book: Vieillot, Louis Pierre . Louis Pierre Vieillot . 1817 . Nouveau dictionnaire d'histoire naturelle, appliquée aux arts, à l'agriculture, à l'économie rurale et domestique, à la médecine, etc. . Nouvelle édition . 11 . Paris . Deterville . 195 . 10.5962/bhl.title.20211 . French .
9. For instance in Book: Naumann, Johann Friedrich . Johann Friedrich Naumann . 1897 . Naturgeschichte der Vögel Mitteleuropas . 2 . . ; see also: image on Wikimedia Commons.
10. Dyrcz . A. . Christie . D.A. . Garcia . E.F.J. . 2020 . Eurasian Reed Warbler (Acrocephalus scirpaceus), version 1.0 . Billerman . S.M. . Keeney . B.K. . Rodewald . P.G. . Schulenberg . T.S. . Birds of the World . Ithaca, NY, USA . Cornell Lab of Ornithology . 10.2173/bow.eurwar1.01 . 241415727 . 26 August 2022 . subscription .
11. Olsson . U. . Rguibi-Idrissi . H. . Copete . J.L. . Arroyo Matos . J.L. . Provost . P. . Amezian . M. . Alström . P. . Jiguet . F. . 2016 . Mitochondrial phylogeny of the Eurasian/African reed warbler complex (Acrocephalus, Aves). Disagreement between morphological and molecular evidence and cryptic divergence: A case for resurrecting Calamoherpe ambigua Brehm 1857 . Molecular Phylogenetics and Evolution . 102 . 30–44 . 10.1016/j.ympev.2016.05.026. 27233439 . 2016MolPE.102...30O .
12. Book: Campbell . Donald . Walters . Martin . The Encyclopedia of British Birds . 2000 . Parragon . Bath . 0752541595 . 254 . en-GB.
13. Davies . N.B. . Brooke . M. De L. . 1989 . An experimental study of co-evolution between the cuckoo, Cuculus canorus, and its hosts. I. Host egg discrimination . Journal of Animal Ecology . 4995 . 58 . 1 . 207–224 . 10.2307/4995. 1989JAnEc..58..207D . 56303051 .