Fülleborn's Boubou
Laniarius fuelleborni
Mid-sized bushshrike that is completely black. Found in the undergrowth of humid forest at middle and high elevations. A skilled skulker that is most often detected by voice. Gives a wide variety of vocalizations, which include whistles, explosive notes, frog-like calls, and ratchets. The most common vocalization is a quick series of three whistles: “whit-whit-wee.” Very similar to Slate-colored Boubou, but found in montane forest rather than lower-elevation savanna and woodland.
Identification
Fülleborn's boubou is a medium-sized boubou, growing to a length of 18 to 20 cm (7 to 8 in). The sexes are similar and the adult plumage is a bluish slate-grey with a blacker head, wings and tail, all of which are slightly glossed. The underparts are dark slatey-grey and the underwing is dark brown. The eye is brown or reddish-brown and the beak and legs are black. The upper parts of the juvenile are a brownish-black colour, faintly spotted with buff, and lacking gloss. The underparts are barred with buffy greyish-black. The adult plumage is gained at six or seven weeks. This boubou only takes to the wing occasionally and has a ponderous flight.
Taxonomy
This bird has often been considered to be conspecific with the mountain sooty boubou (Laniarius poensis) complex (including the albertine sooty boubou (Laniarius holomelos) and Willard's sooty boubou (Laniarius willardi)), but Fülleborn's boubou possesses a different juvenile plumage of that complex, as well as differing morphologically and with respect to vocalizations. Recent genetic studies also indicate the two species are closely related but do not form a superspecies. Fülleborn's boubou is also similar to the slate-colored boubou (Laniarius funebris), but they occupy different ecological niches.
- Scientific name
- Laniarius fuelleborni
- Authority
- (Reichenow, 1900)
- Order
- Passeriformes
- Family
- Malaconotidae
- Genus
- Laniarius
Range and habitat
- Migration
- Resident species
Conservation
- Population trend
- stable
Photos
Distribution
Bird Calls
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