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Yellow-capped Weaver Ploceus dorsomaculatus

IUCN: Least concern     Discovery: 095

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News items about species

Discovery

Yellow-capped Weaver
Yellow-capped Weaver female,
figure from Reichenow (1896)
Yellow-capped Weaver
Yellow-capped Weaver,
figure from Ogilvie-Grant (1917)
Yellow-capped Weaver map
Yellow-capped Weaver
distribution, type locality circled

Introduction

The Yellow-capped Weaver was formally described by Anton Reichenow, a German ornithologist and herpetologist.

The Yellow-capped Weaver was collected by Georg August Zenker, a German zoologist and botanist.

In 1886 Zenker accompanied Italian explorers on an expedition to the lower reaches of the Congo River. He then settled on a plantation in Gabon. The company had to give up the plantation in 1889, so the company owner made Zenker head of the research station at Yaounde in the interior of Cameroon - Zenker remained here from 1889-1895.

Zenker collected 5000 plant specimens and a number of birds which were sent to the Berlin Museum. Zenker collected a female Yellow-capped Weaver sometime between 1889 and 1893, probably closer to 1893. Unfortunately the crate containing the Yellow-capped Weaver type became wet, and mould appeared on this specimen. Although damaged, the type is still in the Berlin Museum.

The male Yellow-capped Weaver was first described several years later by Bates 1911b, who collected a pair at Bitye, Cameroon.

The first illustration of the Yellow-capped Weaver was of the type, published by Reichenow (1896) three years after he published the description. The next illustration was by Ogilvie-Grant 1917, who painted the head and chin patterns of male and female Yellow-capped Weavers, this being the first time that the male was illustrated.

Scientific citation

Symplectes dorsomaculatus Reichenow 1893b, Orn. Monatsber., 1, p.177, Jaunde, Cameroon.

Meaning of names

dorsomaculatus, Latin: dorsum, dorsi, the back; maculatus, spotted, blotched (maculare, to stain).

First English name

Mottle-backed Black-winged Weaver (Shelley 1905b).

Alternate names

Mottle-backed Black-winged Weaver, The Yellow-capped Weaver, Yellow Capped Weaver.

Collector

Georg August Zenker.

Date collected

Between 1889-1893.

Locality collected

Jaunde, Cameroon.

Type specimens

The type is in the Berlin Museum (ZMB_30841).

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 [212] - Discovery [95]: Yellow-capped Weaver on 2016-07-06

1. Basic biology

Yellow-capped Weaver
Yellow-capped Weaver female (left), male (right),
figure from Bannerman 1949 (yellow added)
Yellow-capped Weaver
Yellow-cap Weaver
head & chin patterns
of males & females,
figure from
Ogilvie-Grant 1917
Identification. The Yellow-capped Weaver is similar to the 'nuthatch' (bark-gleaning) weavers, though no longer considered to be one (see here).

The Yellow-capped Weaver overlaps with the Brown-capped Weaver and Preuss's Weaver in range, but differs from them in having a black rump, and little yellow on the black back. The male has the forehead to nape yellow, and the female has a black head but yellow nape and throat. The juvenile is olive-green below, with a brown bill, and is blackish-brown above, and over time this is replaced by yellow and black.

Distribution. The Yellow-capped Weaver occurs in two widely separated populations: in eastern DRCongo (and 1 recent record in Uganda), and in West Africa from south Cameroon and Central African Republic to northern Gabon and Congo Republic (see map below, based on Birds of Africa). There are no subspecies of the Yellow-capped Weaver. It is a very poorly known species with a patchy and very localized distribution.

Yellow-capped Weaver map

Habitat. The Yellow-capped Weaver inhabits evergreen forest. In primary forest it is often found near clearings, and it enters secondary forest.

Food. The Yellow-capped Weaver feeds on insects and other arthropods, including butterflies and caterpillars, larvae of mantids, alate termites, and spiders.

It forages in foliage in the canopy and middle storey, but not along branches as in the 'nuthatch' weavers. It flycatches insects in the open canopy. The Yellow-capped Weaver occurs in small flocks of 6-8 individuals, and also joins mixed-species flocks.

Breeding. The Yellow-capped Weaver is a solitary nester and is probably monogamous. The nest is ball-shaped, with a short, loosely woven entrance tunnel directed downwards. The nest is woven around the fork of a hanging branch more than 30 m above the ground.

The eggs have not not described and nothing else is known about breeding.

The above is based on Weaver Wednesday, a weekly series about weaver species.
This species text first appeared as Weaver Wednesday [91]: Yellow-capped Weaver on 2014-03-12

2. Breeding facts

Pair bond
Presumed monogamous
Breeding season
Aug, Gabon; specimen with enlarged gonads in Jun, DRCongo
Nest site
woven around fork of hanging branch more than 30 m above ground
Nest building
no information
Colony size
Solitary nester
Clutch size
no information
Egg colour
no information
Egg size
no information
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

No records yet - be the first to submit a PHOWN record!
See PHOWN summary page 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