Thick-billed mockers
| Thick-billed mockers | ||||||||||||
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Thick-billed Mockers ( Arundinax aedon ) |
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Arundinax | ||||||||||||
| Blyth , 1845 | ||||||||||||
| Scientific name of the species | ||||||||||||
| Arundinax aedon | ||||||||||||
| ( Pallas , 1776) |
The thick-billed warbler ( Arundinax aedon , Syn . : Phragamaticola aedon , Iduna aedon , Acrocephalus aedon ), also called the thick-billed reed warbler , is a species of bird from the reed warbler family (Acrocephalidae). The species lives in young forest stages in southern Siberia and winters in India. In Central Europe the species is an extremely rare exception in autumn. The thick-billed mocker is the only representative of the genus Arundinax and is more closely related to the mockers of the genus Iduna than to the reed warblers of the genus Acrocephalus , with which it was previously placed in a genus.
features
With a body length of 16.0 to 17.5 cm, the thick-billed mocker is one of the large reed warbler-like. The size corresponds approximately to the reed warbler . The beak is short and strong, the hand-wing projection is short compared to other members of the family, and the tail is strongly rounded at the end.
Similar to the garden warbler , the species does not show any distinctive coloring or drawing features. The top is gray-brown; The rump , base of the tail and vertex are a little warmer red-brown. The underside is dirty white; The chest, flanks and under tail-coverts are tinged with beige. In contrast to all other reed warblers found in Europe, the head does not show a clear stripe over the eyes. The rein stripe is light gray, the eye ring is whitish beige-gray, so that the eye clearly stands out. The darker part often forms an implied head cap. The upper bill is black-gray, the lower bill light orange-beige. The legs are dark gray.
Vocalizations
The continuous singing resembles that of the swamp reed singer and yellow mocker . It is loud, is often performed at a rapid pace and consists of numerous imitations of the singing of other birds combined with rough chirping tones. Many stanzas are repeated several times. Overall, the singing is not quite as fast as that of the swamp reed singer and it lacks the "zi-uhh" elements of the yellow mocking song . Various clicking calls like "chack" or "tjack" can be heard at the hatchery .
Distribution, habitat and migrations
The breeding area of the thick-billed mockers is limited to southern Siberia , northern Mongolia and northeast China . He settles there in dense pre-forest stadiums made of birch and willow on the edge of taiga bogs, in forest clearings and on older clear cuts. The species winters in Southeast Asia from India via Nepal and southern China to Indochina .
Existence and endangerment
There are no estimates of the size of the world population. According to the IUCN, the species is common at least in parts of its range and is therefore considered to be harmless.
literature
- Lars Svensson , Peter J. Grant, Killian Mullarney, Dan Zetterström: The new cosmos bird guide . Kosmos, Stuttgart 1999, ISBN 3-440-07720-9 , pp. 298-299.
Web links
- Arundinax aedon in the Red List of Threatened Species of the IUCN 2008. Posted by: BirdLife International, 2008. Accessed October 30 of 2008.
- Image of the thick-billed reed warbler