Stentor Reed Warbler

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Stentor Reed Warbler
Clamorous reed warbler.jpg

Reed warbler ( Acrocephalus stentoreus )

Systematics
Order : Passerines (Passeriformes)
Subordination : Songbirds (passeri)
Superfamily : Sylvioidea
Family : Reed warbler (Acrocephalidae)
Genre : Reed warbler ( Acrocephalus )
Type : Stentor Reed Warbler
Scientific name
Acrocephalus stentoreus
( Hemprich & Ehrenberg , 1833)

The reed warbler ( Acrocephalus stentoreus ) is a medium-sized species of songbird from the reed warbler family , which is widespread in North Africa and Asia. In size, shape, plumage and habitat of Stentorrohrsänger similar to the spread in Europe Drosselrohrsänger he south joins with a small overlap at its distribution area.

Appearance

The birds have a brown, almost unpatterned plumage, which on the belly i General is significantly brighter than the rest of the body. However, some of the birds in the Israeli-Jordanian part of the distribution area (subspecies A. s. Levantinus ) belong to an unusually dark colored morph, especially on the belly . Depending on the subspecies, it can also happen that the belly, the underside of the tail and the throat are completely white.

The wings and the relatively long tail are also brown with black or dark brown stripes. Above the eyes they have a thin, elongated light or dark brown stripe that barely extends into the area behind the eye. The beak is dark with a light base, relatively long and pointed. The legs are dark gray to dark green blue. The body length of this large reed warbler is 18-20 cm, the weight 23-34 g.

Distribution and way of life

Singing stented warbler
(Lake Zakher, United Arab Emirates , 2017)

The stented warbler occurs as a breeding bird from northeast Africa over the coastal areas of the Arabian Peninsula, Iraq and Iran, the Central Asian republics, Pakistan and parts of India to Southeast Asia (rarely in the Philippines). Only the birds in the Central Asian area are migratory; they overwinter in India. In the eastern and western parts of the range, most of the birds are resident birds. This species inhabits the wetlands there, especially the papyrus and reed belts. In the dry season they move to gardens and the surrounding bushland.

Typically for reed warblers, they feed on insects that they peck from plants or catch in flight.

The singing of the males is loud, powerful and contains scratchy and melodic sounds. It is more varied and structured than that of the similar throttle pipe warbler. In comparison to this, however, the singing is seldom performed from exposed reed tips or similar singing rooms. Its volume also gives it its name: Stentor ( Greek Στέντωρ) is described in the Iliad as a man with a deafening voice.

Due to its widespread distribution and since no endangerments are known for this species, the IUCN classifies this species as not endangered ( least concern ).

Reproduction

The bowl-shaped nest is woven from ground joint and other aquatic plants. The female lays 2–7 light-colored eggs with dark spots. The incubation period is 12-14 days, after which the young remain in the nest for up to 15 days. When they have left it, they are not yet fit to fly and their parents will continue to care for them for a few more days.

Systematics

In the Handbook of the Birds of the World , four subspecies are distinguished.

The nominate form:

  • A. s. stentoreus ( Hemprich & Ehrenberg , 1833) - Egypt and Levant (The birds from the Levant are sometimes listed as their own subspecies A. s. levantinus .)

The three other subspecies form the "Indian group", which has recently been proposed by some authors as a separate species "Indian reed warbler" ( A. brunnescens ).

The International Ornithological Union lists four other subspecies on the islands of the Indonesian archipelago . A possible assignment to the australian reed warbler ( A. australis ), which is sometimes also regarded as a subspecies of the stentor reed warbler, has not been fully clarified.

literature

  • Christopher M. Perrins (ed.): The great encyclopedia of birds. Translated from the English by Christine Barthel, Peter H. Barthel. Orbis, Munich 1996, ISBN 978-3-572-00810-0 , pp. 279, 281.
  • Christopher M. Perrins (Ed.): The FSVO encyclopedia birds of the world. Translated from the English by Einhard Bezzel. BLV, Munich / Vienna / Zurich 2004, ISBN 978-3-405-16682-3 , pp. 568-572 (title of the original English edition: The New Encyclopedia Of Birds. Oxford University Press, Oxford 2003).

Individual evidence

  1. ↑ a b c H. Shirihai and L. Svensson: Handbook of Western Palearctic Birds Volume I Passerines: Larks to Warblers . Helm, London 2018, ISBN 978-1-4729-3757-5 , pp. 418-422 .
  2. ↑ a b c Clamorous reed-warbler (Acrocephalus stentoreus) . In: J. del Hoyo, A. Elliott, J. Sargatal, DA Christie & E. de Juana, E. (Eds.): Handbook of the Birds of the World Alive . Lynx Edicions, Barcelona ( hbw.com [accessed August 31, 2018]).
  3. ^ Frank Gill & David Donsker, IOC World Bird List v 8.2  : Bushtits, leaf warblers, reed warblers

Web links

Commons : Stentorrohrsänger ( Acrocephalus stentoreus )  - Collection of images, videos and audio files