Trauerdrongo

Bestimmung

The bird possesses a robust black beak and red eyes. When born, they lack feathers, exhibiting reddish skin, an orange beak, yellow gape flange, brown eyes, and a black beak. Juvenile fork-tailed drongos are dark brown tone with some buff-colored feather tips, a less pronounced tail fork, brown or grey eyes, and a pale mouth. While resembling adults, they lack the glossy shine on the lower body and display pale feathers on certain areas. Both genders share a black body with a blue-green iridescence in specific regions. The underside, including the belly, is uniformly black, contrasting with the glossy black-blue upper body. Their lengthy tail is deeply forked and black, measuring approximately 115–126 mm in length and 19–23 mm in depth. They feature short legs and a wingspan of 134 mm. Their bill is characterized by a depth of 0.4 mm and a length of 2.8 mm.<p>Following breeding, adult birds experience a complete molt, usually taking place between December and March in Southern Africa, with varying months in other areas. Young birds maintain their immature plumage until the next breeding season. The partial post-juvenile molt initiates prior to the growth of new wing and tail feathers following the nesting period. Instances of leucism have been observed in the fork-tailed drongo.<p>This bird is notably vocal, often commencing the dawn chorus and often is the last heard at dusk. Their pre-dawn calls comprise variations such as jwaaa-jwaaa and jeewy-jeeerr. They exhibit a diverse repertoire of vocalizations, ranging from sharp calls, brief whistles, and squeaks to fluid, raspy, and scratchy notes delivered rapidly or with extended pauses. Their repertoire includes calls like chyup, tjaaa, the resounding jer-woo, and the whistled jee-lu. Mated pairs participate in coordinated duets lasting 4–5 minutes. Their songs feature soft, high-pitched, nasal, or melodious whistles, chirps, grinding sounds, and liquid chattering.<p>These birds produce specific drongo calls and mimic other bird species such as bocage's bushshrike, thrushes, tchagras, bulbuls, birds of prey and owls. They have also been observed imitating the mewings of cats and the alarm calls of meerkats.

Taxonomie

The fork-tailed drongo was described by Johann Matthäus Bechstein in 1794. Its populations are genetically distinct, and four races are usually accepted, though as of 2023, D. a. divaricatus and D. a. lugubris are included within the taxon by the IOC. The races D. a. modestus, together with D. a. coracinus and D. a. atactus are usually split as a separate species, the velvet-mantled drongo, D. modestus (Hartlaub, 1849).

Wissenschaftlicher Name

Dicrurus adsimilis

Autorität

(Bechstein, 1794)

Ordnung

Passeriformes

Familie

Dicruridae

Gattung

Dicrurus

Verbreitung und Lebensraum

The fork-tailed drongo is a common and widespread resident breeder in Africa south of the Sahara. This insect-eating bird is usually found in open woodland, savanna and forest edge and is tolerant of arid climates. Its range was formerly considered to include Asia, but the Asian species is now called the black drongo (D. macrocercus). The bird can be found at heights as high as 2200 meters.

Zugverhalten

Standvogel

Verhalten

Zugverhalten: Standvogel.

Schutzstatus

Bestandstrend: stabil.

Bestandstrend

stabil