Red rump bearded bird
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Red- rump bearded bird ( Pogoniulus atroflavus ) |
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| Pogoniulus atroflavus | ||||||||||
| ( Sparrman , 1798) |
The red-rumped tinkerbird ( Pogoniulus atroflavus ) is a species of bird from the family of the African barbets . It is the largest species in the genus Pogoniulus . The distribution area covers large parts of southern West Africa and Central Africa. The IUCN classifies the red rump bearded bird as not endangered ( least concern ) due to its large distribution area, the apparently stable population and currently undetectable essential risk factors .
description
With a body length of 13 cm, the red rump bearded bird is the largest species of the genus Pogoniulus and shows no external sexual dimorphism . The wing length in males is 57–65 mm, the tail length 28–31 mm and the beak length 12.0–14.9 mm; in females the wing length is 58–65 mm, the tail length 27–31 mm and the beak length 13.0–15.2 mm. Males weigh 17–21.5 g, females 14–20 g.
In both sexes, the back and the top of the control feathers are black, the rump and tail-coverts are red. The blue-black upper wing coverts are lined with yellow, the wide yellow seams of the middle upper wing coverts form a striking yellow wing band. The wings are black on top with narrow yellow edges and white inner flag bases . The entire underside of the fuselage is olive gray with a green-yellow wash. The lower wings are gray and white, the quills white.
The head is predominantly black, the sides of the head show a fine yellow stripe above the eye from the front edge of the eye to about the level of the rear edge of the ear covers, another fine yellow stripe below the eye to the rear ear covers and a wider yellow stripe above the narrow black one Beard stripe that extends to the lower back of the ear covers. The neck and sides of the neck are black, the chin and throat are yellow.
The strong beak is black. The iris is dark brown, the eye ring black. Legs and toes are blue-gray, green-blue, or purple.
Young birds are generally more dull and less contrasty in color than adult birds. The top is less shiny and more brown with olive green feather tips, all yellows and reds are paler. The underside is less yellow and olive and more gray.
distribution and habitat
The distribution area covers large parts of southern West Africa and Central Africa. It extends in the west from the south of Senegal and Gambia to the east over the Ivory Coast , Ghana , the south of Nigeria and Cameroon to the south-east of the Central African Republic and the west of Uganda , to the south to the Angolan province of Cabinda , to the central democratic region Republic of the Congo and up to the Ruwenzori Mountains in the border area of the Democratic Republic of the Congo and Uganda. The size of the total distribution area is estimated at 2.67 million km².
The red rump bearded bird primarily inhabits open forest areas such as clearings, forest edges, secondary forest and older mangrove forests , but also gardens, farms and other cultivated land. The species usually inhabits the lowlands up to about 800 m altitude, but also occurs in West Africa up to 1550 m altitude, in Cameroon up to 1800 m and in the Ruwenzori Mountains up to 2400 m.
Way of life
The species is usually found singly or in pairs and occasionally joins mixed flocks of birds. The food sought in all tree layers consists of fruits, insects and spiders. The species breeds in burrows in tree or branch stumps. The clutch consists of two or three eggs; further information on the brood biology is not yet available.
Existence and endangerment
There is no information on the size of the world population, the species is generally considered to be rare. Due to the large distribution area, the apparently stable population and currently unrecognizable essential risk factors, the IUCN classifies the red rump bearded bird as non-endangered ("least concern").
supporting documents
literature
- Lester L. Short and Jennifer FM Horne: Toucans, Barbets and Honeyguides - Ramphastidae, Capitonidae and Indicatoridae. Oxford University Press, Oxford 2001, ISBN 0-19-854666-1 , pp. 157-158.
Individual evidence
- ↑ Terry Stevenson, John Fanshawe: Birds of East Africa. Christopher Helm Verlag, 2004, ISBN 978-0713673470 , p. 252.
- ↑ a b Der Rotbürzel-Bartvogel at BirdLife International . Retrieved July 2, 2011.
- ↑ Pogoniulus atroflavus in the IUCN Red List of Threatened Species 2011.1. Listed by: BirdLife International, 2009. Retrieved June 29, 2011.
Web links
- Videos, photos and sound recordings of Red-rumped Tinkerbird (Pogoniulus atroflavus) in the Internet Bird Collection