Yellow-throated dwarf bearded

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Yellow-throated dwarf bearded
Yellow-throated dwarf mustard (above), including the almost identical looking yellow-tufted dwarf mustard

Yellow-throated dwarf mustard (above), including the almost identical looking yellow-tufted dwarf mustard

Systematics
Class : Birds (aves)
Order : Woodpecker birds (Piciformes)
Family : African bearded birds (Lybiidae)
Genre : Dwarf beards ( Pogoniulus )
Type : Yellow-throated dwarf bearded
Scientific name
Pogoniulus subsulphureus
( Fraser , 1843)

The yellow-throated dwarf bearded ( Pogoniulus subsulphureus ) is a species of bird from the African bearded family. The species occurs in Africa on both sides of the equator. Several subspecies are distinguished. The IUCN classifies the yellow-throated dwarf beardling as not endangered.

Appearance

The males of the nominate form reach a wing length of 4.6 to 5.1 centimeters. The tail length is 2.1 to 2.4 centimeters. The beak is between 1 and 1.2 inches long. They weigh about 10 grams. Females have similar body measurements. As is typical for dwarf beards, there is no other sexual dimorphism .

Males and females are black from forehead to neck, the black sides of the head are interrupted by yellow lines. A fine, golden yellow runs along the base of the beak, then below the eyes to the sides of the throat. A second line, which is briefly interrupted behind the eye in most individuals, runs above the eye to the nape of the neck. The top of the body is glossy black, the rump is yellow to gold in color. The control feathers are lined with black and narrow yellow. The chin and throat are yellow, the chest is gray-yellow, the flanks are gray, the belly is pale yellow to white. The beak is black. The featherless skin around the eyes is blackish, the eyes are brown. The legs and feet are blue-green to gray or black, the claws are black.

Young birds are a little more dull in color on the upper side of the body, the throat is less bright and contrasts less strongly with the chest. The base of the beak is horn-colored to yellow, the eyes are dull brown or even gray.

When observing the field, the yellow-throated dwarf bearded can hardly be distinguished from the yellow-tufted dwarf bearded bear belonging to the same genus . In western Ghana, the subspecies Pogoniulus subsulphureus chrysopygius also has a whitish throat similar to this species. Other subspecies differ from the yellow-tufted dwarf bearded by the deeper black on the upper side of the body, the yellow throat and the yellow body. In terms of behavior, the yellow-throated dwarf beardling resembles both the yellow tufted dwarf beardling and the red rump bearded bird .

Distribution area and habitat

The distribution area of ​​the yellow-throated dwarf beardling includes Liberia, the forests in southwest Senegal, Guinea, Sierra Leone, Ghana, southwest Togo, southern Nigeria and Cameroon, southern Central African Republic, western and southern Uganda, and the Democratic Republic of the Congo Bioko Island in the Gulf of Guinea .

The yellow-throated dwarf beardling is a resident bird that occurs from sea level to altitudes of 2,100 meters. On the island of Bioko it occurs predominantly between 800 and 1,000 meters and lives here at a lower altitude than the yellow tufted dwarf beardling. Its habitat are forests, forest edges, swamp forests as well as older secondary forests and mountain forests. Where the yellow tufted dwarf beardling occurs, it is typically found in denser forests.

Way of life

The yellow-throated dwarf beardling is mostly found in the crowns of trees and rarely comes down into the undergrowth. It mainly eats fruits as well as insects and their larvae. As with most bearded birds, its habitat must have dead trees into which it chops its nesting holes. The song of the yellow-throated dwarf beardling can be heard all year round, which indicates that it is a territorial bird. The size of the area is estimated at seven to ten hectares.

The clutch consists of two to three eggs. Little is known about the breeding and nestling times. Nestlings are fed by both parent birds at an interval of one to 13 minutes.

supporting documents

literature

  • Lester L. Short, Jennifer FM Horne: Toucans, Barbets and Honeyguides - Ramphastidae, Capitonidae and Indicatoridae. Oxford University Press, Oxford 2001, ISBN 0-19-854666-1 .

Individual evidence

  1. ↑ Short et al., P. 159.
  2. ↑ Short et al., P. 158.
  3. ↑ Short et al., P. 159.
  4. ↑ Short et al., P. 159.
  5. ↑ Short et al., P. 159 and p. 160.
  6. ↑ Short et al., P. 160.

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