Weaver species

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Brown-capped Weaver Ploceus insignis

IUCN: Least concern     Discovery: 090

Categories: nuthatch, fruit,
News items about species

Discovery

Brown-capped Weaver
Brown-capped Weaver female,
figure from Sharpe (1891)
Brown-capped Weaver
Brown-capped Weaver male,
figure from Sjostedt (1895)
Brown-capped Weaver map
Brown-capped Weaver
distribution, type locality circled

Introduction

The Brown-capped Weaver was formally described by Richard Bowdler Sharpe, an English zoologist and ornithologist who worked as curator of the bird collection at the British Museum of natural history.

The Brown-capped Weaver was collected by Frederick John Jackson, an English administrator, explorer and ornithologist.

In 1889 Jackson led an expedition designed to open up the regions between Mombasa and Lake Victoria, which was largely unknown to Europeans at that time, and if possible to obtain news of Emin Pasha. He travelled to Lake Victoria and then went north and east to travel around the lake to Mt Elgon. Mount Elgon is an extinct shield volcano on the border of Uganda and Kenya, and the mountain's highest point, named "Wagagai", is located within the country of Uganda.

Jackson went further north past Mt Elgon on the eastern (Kenyan) side but had to return when he encountered hostile tribes. He used the opportunity to climb Mt Elgon (from the north side) and collect new bird species. He reached the crater at the top on 17 Feb 1890, and camped there for the night. While on the slopes of Mt Elgon, he collected the female of the Brown-capped Weaver.

The collection was sent to Sharpe, who wrote up several new species. He named this weaver "insignis" (ie notable) as the plain yellow back was unlike the back colour of any other weaver he knew.

The first illustration of the Brown-capped Weaver was the female type specimen, published by Sharpe (1891). The next illustration was of an adult male in Sjostedt (1895), considered to be a new species at the time.

Scientific citation

Sycobrotus insignis Sharpe 1891b, Ibis, p.117, pl. 6, fig. 1, Mt. Elgon, Uganda.

Meaning of names

insignis, Latin: notable, extraordinary, remarkable.

First English name

Yellow-bodied Black-winged Weaver (Shelley 1905b).

Alternate names

Cameroon Brown-capped Weaver, Chestnut-capped Weaver, Chestnut-headed Yellow-backed Weaver, Congo Brown-capped Weaver, Nairobi Brown-capped Weaver, Yellow-bodied Black-winged Weaver.

Collector

Frederick John Jackson.

Date collected

Feb 1890.

Locality collected

Mt. Elgon, Uganda.

Type specimens

The type is in the Bristish Museum (BM 1893.12.1.6).

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 [207] - Discovery [90]: Brown-capped Weaver on 2016-06-01

1. Basic biology

Brown-capped Weaver
Brown-capped Weaver male,
figure from Sjostedt 1895
Brown-capped Weaver
Brown-capped Weaver female,
figure from Sharpe 1891

Identification. The Brown-capped Weaver Ploceus insignis is one of the 'nuthatch' (bark-gleaning) weavers. The Brown-capped Weaver has a yellow body with plain black wings and tail. The male has a black face and throat with a chestnut crown and nape. The female has the entire head black. The similar Preuss's Weaver has a chestnut wash on the breast and its female has a yellow crown. The Yellow-capped Weaver differs from the Brown-capped Weaver in having a black rump.

Brown-capped Weaver map

Distribution. The Brown-capped Weaver occurs in scattered localities in West Africa from Nigeria to Angola. It also occurs along the Albertine Rift and in East Africa, especially western Kenya (see map left, based on Birds of Africa). Its distribution is very patchy, but is still widely distributed, but is uncommon in Angola and Gabon. Several subspecies of the Brown-capped Weaver have been described but are no longer recognised.

Habitat. The Brown-capped Weaver inhabits tall montane forest, a vulnerable habitat type. It also occurs in bamboo forest, secondary forests, gallery forest and coffee plantations. It is often found in areas with an open canopy and dense understorey vegetation.

Brown-capped Weaver
Brown-capped Weaver pair at nest

Food. The Brown-capped Weaver feeds mainly on insects, such as caterpillars, and fruit. It moves at all levels in forests, hopping along boles and thicker lateral branches in the canopy. The The Brown-capped Weaver probes exposed bark and epiphytes with its bill. It feeds solitarily, in pairs, or in family parties of three or four individuals; it also joins mixed-species flocks.

Breeding. The Brown-capped Weaver is probably monogamous, and is a solitary nester. The male uses a short courtship song away from the nest, and also sings when the female enters the nest. The nest is retort-shaped, and may have a long entrance tube. The nest is attached to the underside of a branch or at the tip of a branch, often above a forest track or clearing. The clutch is 2 eggs, which are pale blue with a few brown spots.

The above is based on Weaver Wednesday, a weekly series about weaver species.
This species text first appeared as Weaver Wednesday [78]: Brown-capped Weaver on 2013-12-11

2. Breeding facts

Pair bond
Presumably monogamous
Breeding season
Mar and Dec in Cameroon, Mar and Oct in Sudan, Jan in E DRCongo (Itombwe), Aug-Sept and Dec in Uganda and Jan-Apr and Nov in Kenya
Nest site
4-6.5 m above ground and fixed to underside of branch or at tip of branch, often above forest track or clearing
Nest building
no information
Colony size
Solitary nester
Clutch size
2 eggs
Egg colour
pale blue with sparse brown spots
Egg size
average size of four eggs 22.4 x 15.5 mm (Cameroon)
Incubation
no information
Chicks and nestling period
no information

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

3. Photos of Weaver Nests


Vm 13809

Vm 13807

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