Biology:Brubru

Short description: Species of bird

Brubru
File:Brubru (Nilaus afer) (022A-WA03044X0030-0002M0).ogg
Song recorded in Kiboko, Kenya
Conservation status
Least Concern (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Passeriformes
Family:	Malaconotidae
Genus:	Nilaus Swainson, 1827
Species:	N. afer
Binomial name
Nilaus afer (Latham, 1801)
Synonyms
Nilaus capensis

The brubru (Nilaus afer) is a species of bushshrike (family Malaconotidae) found in most of Sub-Saharan Africa. It is the only member of the genus Nilaus.

Distribution and habitat

Its habitat is dry open woodland, but varies geographically. The six northern races and the subspecies N. a. Brubru of southern Africa are found in acacia and broadleaved woodland, whereas the three subspecies in a belt from northeastern Angola and northern Namibia east to Tanzania and northern Mozambique occur in Brachystegia miombo woodland.

Description

Male N. a. massaicus

The brubru is a small passerine, 12–15 cm long. The adult male of the nominate subspecies, N. a. afer, has a black crown, white supercilium and forehead, and black eyestripe. The back is black with a tawny strip, the rump is mottled black, and the tail is black with white tips and edges to the outer feathers. The wings are black with a buff shoulder stripe. The underparts are white with rufous flanks.

The female is duller and browner, with some streaking on the underparts and less rufous on the flanks. The juvenile is mottled brown, buff and white above, with buff edgings to the wing and tail feathers. Its underparts are whitish with brown barring.

The male of the most distinctive of the other subspecies, N. a. nigritemporalis, occurring in the central belt across Africa, has no supercilium and a white, not buff, shoulder patch. Other subspecies differ in the extent of the supercilium and rufous flanks, and the shade and degree of streaking of the underparts.

The song is a duet. The male gives a soft prrrrruuu call, often answered by the female's eeeu.

Behaviour

The brubru is usually solitary or found in pairs; it is a restless but unobtrusive arboreal species which hunts insects in the canopy. Its need for large trees in which to feed means that it has an unusually large territory for a bird of its size, typically 35 hectares. If insects are abundant, it will join mixed-species feeding flocks.

Breeding

The flimsy cup nest is constructed from twigs, grass and spider webs in a tree fork, and decorated with lichens. It is very well camouflaged. The female normally lays two eggs, which are off-white, greenish or greyish blotched with grey or brown. Both sexes incubate for about 19 days to hatching. The chicks fledge in another 22 days but are dependent for about eight weeks.

This species often destroys its own nests, especially when disturbed.

Parasites

Two quill mites, Neoaulonastus malaconotus and Syringophiloidus nkaii, have been identified as ectoparasites of the brubru. They belong to the Syringophilinae, which are known to infect several bushshrike species.

References

• Barlow, Wacher and Disley, Birds of The Gambia ISBN:1-873403-32-1
• Harris and Franklin, Shrikes & Bush Shrikes (Christopher Helm, 2000) ISBN:0-691-07036-9
• Sinclair, Ian; Hockey, Phil; Tarboton, Warwick (2002). SASOL Birds of Southern Africa. Struik. ISBN 1-86872-721-1. 

External links

• Brubru - Species text in The Atlas of Southern African Birds.

Wikidata ☰ Q850113 entry