Weaver species

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White-billed Buffalo-Weaver Bubalornis albirostris

IUCN: Least concern     Discovery: 026

Categories: black, cooperative, long tail, acacias, fruit, frogs, baobab, Linnaeus, Gymnogene, pest,
News items about species

Discovery

White-billed Buffalo-Weaver
White-billed Buffalo-Weaver,
figure from Temminck 1828
Coenraad Jacob Temminck
Temminck published 1st figure of
the White-billed Buffalo-Weaver
White-billed Buffalo-Weaver map
White-billed Buffalo-Weaver
distribution, type locality circled

Introduction

The White-billed Buffalo-Weaver was formally described by Louis Jean Pierre Vieillot, a French ornithologist. Vieillot also gave a French name to this species, ie. Le Gros-bec noir a bec blanc (meaning The black Grosbeak with a white beak).

Vieillot described the plumage of the White-billed Buffalo-Weaver and listed it from Africa. The type locality was later restricted to Senegal, based on the amount of white in the wing of this species.

This species was already described by Brisson 1760, based on specimens from coastal Africa, in the collection of Madame de Pompadour in 1754. Either Vieillot found these same specimens in the Paris museum and based his description on them, many decades later, or new specimens arrived from Africa.

The first illustration of this species to be published, was by Coenraad Jacob Temminck 1828, based on a specimen in the Paris museum, from Galam in Senegal. Again, there is the possibility that this is the same specimen as that of Brisson 1760, although Temminck provided his own name for the species.

Scientific citation

Coccothraustes albirostris Vieillot 1817 Nouv. Dict. Hist. Nat., nouv. e'd., 13, p.535 Africa. Restricted to Senegal by Hartert, 1907, Novit. Zool., 14, p.485.

Meaning of names

albirostris Latin: albus, white; -rostris, billed.

First English name

White-billed Nut-cracker (Swainson 1837) - for 2 decades authors used the French or Latin names of this species, before Swainson provided this name.

Alternate names

African ox bird, Black Buffalo Weaver, Kavirondo Buffalo-Weaver, Kenya Buffalo-Weaver.

Collector

Unknown.

Date collected

Before 1817.

Locality collected

Africa. Restricted to Senegal.

Type specimens

Type specimen probably in the Natural History Museum in Paris.

The above is based on Weaver Wednesday 2, a weekly series about the discovery of each weaver species.
This species text first appeared as Weaver Wednesday [143] - Discovery [26]: White-billed Buffalo-Weaver on 2015-03-11

1. Basic biology

White-billed Buffalo-Weaver
White-billed Buffalo-Weaver,
figure from wikipedia
White-billed Buffalo-Weaver
White-billed Buffalo-Weaver,
figure from specimen to show bill shape

Identification. The White-billed Buffalo-Weaver Bubalornis albirostris is white-billed. The adult (photo above left) is black, with white feather bases showing through as small patches on the lower back, flanks and sides of breast; a white wing patch is visible in flight. The conical bill is white and swollen in breeding males (photo above right, from specimen 90331 in Leiden), otherwise black. The immature bird is dark brown with white mottling on the underparts. This species also has a phalloid organ (exposed in photo above left, see also Red-billed Buffalo-Weaver).

White-billed Buffalo-Weaver map

Distribution. No subspecies of the White-billed Buffalo-Weaver are recognised. In the past it has been regarded as conspecific with the Red-billed Buffalo-Weaver. It occurs from Senegal across the savanna belt to western Ethiopia and Kenya (see map above, based on Birds of Africa). In 2009 it was recorded from Tanzania for the first time, from Naani Hill Gate, Serengeti National Park.

White-billed Buffalo-Weaver
White-billed Buffalo-Weaver,
colony in baobab

Habitat. The White-billed Buffalo-Weaver inhabits dry savanna. In West Africa, it is found in very open farmland with patches of scrub, along streams and in belts of thorntrees. White-billed Buffalo-Weaver colonies are often in large trees, in or near villages. It is resident at its nesting colonies; when not breeding, birds forage away the nests but return before sunset to roost in the nest.

Food. The White-billed Buffalo-Weaver feeds on seeds, including crops such as millet; also fruit, grasshoppers, termites, beetles and their larvae, and also small amimals such as frogs. They forage on the ground, search for insects in cowpats, and remove ectoparasites like ticks from cattle. Large noisy, feeding flocks may include individuals from several colonies. Chicks are fed on insects.

Breeding. The White-billed Buffalo-Weaver is strongly colonial (eg. photo left). In a 50km transect survey in baobab savanna in Senegal, 31 trees had large colonies and 29 trees had small colonies; while in acacia savanna, 214 nests were counted in 24km.

The nest is a large compound structure, >1 m in diameter, containing up to 10 individual nest chambers. It is made of dry thorn twigs and branches, and lined with grass and green leaves. The nest is sometimes solitary. The nest entrance is sometimes surrounded by long thorny twigs sticking out. It is built mainly by the male and both sexes add lining. Males may steal material from neighbours, triggering raucous calling. Nest building activity often follows rainfall. In Tanzania, nests may be abandoned, then re-used in subsequent years.

Eggs (clutch 2-4) are whitish or pale greenish, heavily marked with grey and grey-brown. The female incubates the eggs and feeds the young.

The above is based on Weaver Wednesday, a weekly series about weaver species.
This species text first appeared as Weaver Wednesday [28]: White-billed Buffalo-Weaver on 2012-12-26

2. Breeding facts

Pair bond
Polygynous; colonial
Breeding season
Jul-Sept throughout range; also Oct-Nov in some W African countries, mid Feb-Mar in Ethiopia and Eritrea; nest-building activity apparently stimulated by rainfall
Nest site
in thom trees up to 10 m above ground
Nest building
main structure built primarily by male, often stealing sticks from neighbouring nests, both sexes may add Iining material
Colony size
with up to ten individual nest-chambers
Clutch size
2-4
Egg colour
whitish or pale green to bluish, heavily blotched and spotted with grey and grey-brown (Nigeria), or plain to sparsely spotted with brown (Kenya)
Egg size
average for nine eggs in Nigeria 26.7 x 19.6 mm
Incubation
incubation of eggs by female only, no information on duration of incubation period
Chicks and nestling period
feeding of chicks by female only, no information on duration of nestling period; fledged young fed by both sexes

Breeding information based on Handbook of the Birds of the World, Vol. 15.

3. Photos of Weaver Nests


Vm 26288

Vm 26287

Vm 26286

Vm 26285

Vm 26270

Vm 26269

Thumb-nails of most recent PHOWN records - click on one to see its full record
See all PHOWN records for this species here.

PHOWN (Photos of Weaver Nests) provides valuable info on breeding distribution and colony sizes of weavers.
You can contribute by registering and submitting photos at Virtual Museum webpage.

4. Breeding distribution

Google map showing distribution (For species with small ranges you need to zoom in at the correct area to see the range):
yellow blob - range of weaver species; read more about this here.
- PHOWN records with photos
- PHOWN records with no photos (Nest Record Cards, other records)
- Birdpix records
- comments on out of range records, or interesting records
- type locality
CLICK on the marker on the map to see individual record details.

5. Range changes

Still coming

The above is based on Weaver Wednesday 3, a weekly series about range changes in South African weaver species.
This species text first appeared as Still coming