Lesser swamp warbler

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Lesser swamp warbler
Lesser swamp warbler (Acrocephalus gracilirostris), Marievale, 3.jpg
At Marievale, Gauteng
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Acrocephalidae
Genus: Acrocephalus
Species:
A. gracilirostris
Binomial name
Acrocephalus gracilirostris
(Hartlaub, 1864)
Acrocephalus gracilirostris distribution map.png

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 to South Africa. This is a common species of reedbeds in standing water.

Contents

Description

The lesser swamp warbler is a plain-coloured smallish bird 14–16 cm long and weighing around 20 g. Its upperparts are rich brown, and it has a white supercilium. The underparts are white, with a rufous wash to the flanks. The long, strong bill has a slightly down-curved upper mandible; it is blackish-yellow with a yellower base. The legs are blue-grey and the eyes are brown. Adults of both sexes and juvenile birds are very similar in appearance.

The song is rich and melodious, a series of bubbly phrases that include trilling notes, cheerup chee trrreee and a large number of variations, with pauses between phrases.

Behaviour

The lesser swamp warbler builds a deep, firm cup nest from strips of reed blades, grass and sedges, which is lined with finer grasses. It is always placed in reeds above water. It nests mainly from August to December, with the earliest nesters being those in the winter rainfall areas of the Western Cape Province. It lays two or three brown eggs. This species is monogamous, pairing for life.

The lesser swamp warbler is usually seen alone or in pairs, moving through wetland reedbeds, and clambering up and down reed stems. It eats insects and other small invertebrates.

Conservation status

This common species has a large range, with an estimated extent of 5,700,000 km2. The population size is believed to be large, and the species is not believed to approach the thresholds for the population decline criterion of the IUCN Red List (i.e. declining more than 30% in ten years or three generations). For these reasons, the species is evaluated as Least Concern. [1]

Subspecies

Acrocephalus gracilirostris includes the following subspecies: [2]

Related Research Articles

<i>Acrocephalus</i> (bird) Genus of birds

The Acrocephalus warblers are small, insectivorous passerine birds belonging to the genus Acrocephalus. Formerly in the paraphyletic Old World warbler assemblage, they are now separated as the namesake of the marsh and tree warbler family Acrocephalidae. They are sometimes called marsh warblers or reed warblers, but this invites confusion with marsh warbler and reed warbler proper, especially in North America, where it is common to use lower case for bird species.

<span class="mw-page-title-main">Common reed warbler</span> Species of bird

The common reed warbler 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.

<span class="mw-page-title-main">Sedge warbler</span> Species of bird

The sedge warbler is an Old World warbler in the genus Acrocephalus. It is a medium-sized warbler with a brown, streaked back and wings and a distinct pale supercilium. Sedge warblers are migratory, crossing the Sahara to get from their European and Asian breeding grounds to spend winter in Africa. The male's song is composed of random chattering phrases and can include mimicry of other species. The sedge warbler is mostly insectivorous.

<span class="mw-page-title-main">Blyth's reed warbler</span> Species of bird

Blyth's reed warbler is an Old World warbler in the genus Acrocephalus. It breeds in the Palearctic and easternmost Europe. It is migratory, wintering in Bangladesh, India and Sri Lanka. It is one of the most common winter warblers in those countries. It is a rare vagrant to western Europe.

<span class="mw-page-title-main">Paddyfield warbler</span> Species of bird

The paddyfield warbler is a species of marsh warbler. It was formerly included in the "Old World warbler" assemblage. The Manchurian reed warbler was included in A. agricola as a subspecies.

<span class="mw-page-title-main">Moustached warbler</span> Species of bird

The moustached warbler is an Old World warbler in the genus Acrocephalus. It breeds in southern Europe and southern temperate Asia with a few breeding in north-west Africa. It is partially migratory. South-west European birds are resident, south-east European birds winter in the Mediterranean breeding range, and the Asiatic race migrates to Arabia, India and Pakistan.

<span class="mw-page-title-main">Cape Verde warbler</span> Species of bird

The Cape Verde warbler is an Old World warbler in the genus Acrocephalus. It is also known as the Cape Verde cane warbler or Cape Verde swamp warbler, and in Creole as tchota-de-cana or chincherote. It breeds on Santiago, Fogo, and São Nicolau in the Cape Verde Islands. It previously bred on Brava. This species is found in well-vegetated valleys, avoiding drier areas. It nests in reedbeds, two to three eggs being laid in a suspended nest.

<span class="mw-page-title-main">Levaillant's cisticola</span> Species of bird

Levaillant's cisticola, also known as the tinkling cisticola, is a small passerine bird which is native to marshlands in the uplands of Africa, southwards of the equator.

<span class="mw-page-title-main">Cape grassbird</span> Species of bird

The Cape grassbird or Cape grass warbler is an African warbler found in southern Africa. It is the only species placed in the genus Sphenoeacus.

<span class="mw-page-title-main">Acrocephalidae</span> Family of birds

The Acrocephalidae are a family of oscine passerine birds, in the superfamily Sylvioidea.

<span class="mw-page-title-main">Speckled reed warbler</span> Species of bird

The speckled reed warbler or streaked reed warbler is an Old World warbler in the family Acrocephalidae. The species was first described by Robert Swinhoe in 1863.

<span class="mw-page-title-main">Papyrus yellow warbler</span> Species of bird

The papyrus yellow warbler, papyrus flycatcher-warbler or thin-billed flycatcher-warbler is a species of tree warbler; formerly, these were placed in the paraphyletic "Old World warblers". It is monotypic in its genus. It is found in Burundi, Democratic Republic of the Congo, Kenya, Rwanda, Tanzania, Uganda, and Zambia. Its natural habitat is swamps. It is threatened by habitat loss.

<span class="mw-page-title-main">Wattled starling</span> Species of bird

The wattled starling is a nomadic resident bird in eastern and southern Africa. It is a species of grassland, open woodland, and cultivation.

<span class="mw-page-title-main">Oriental reed warbler</span> Species of bird

The Oriental reed warbler 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 of the western Palearctic.

References

  1. 1 2 BirdLife International (2016). "Acrocephalus gracilirostris". IUCN Red List of Threatened Species . 2016: e.T22714859A94430765. doi: 10.2305/IUCN.UK.2016-3.RLTS.T22714859A94430765.en . Retrieved 12 November 2021.
  2. Gill F, D Donsker & P Rasmussen (Eds). 2020. IOC World Bird List (v10.2). doi : 10.14344/IOC.ML.10.2.