Weaver species

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Olive-headed Weaver Ploceus olivaceiceps

IUCN: Near threatened     Discovery: 099

Categories: nuthatch, IUCN,
News items about species

Discovery

Olive-headed Weaver
Olive-headed Weaver adult
figure from Reichenow (1902)
Olive-headed Weaver
Olive-headed Weaver adult
figure from Mackworth (1955)
Olive-headed Weaver map
Olive-headed Weaver
distribution, type locality circled

Introduction

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

The Olive-headed Weaver was collected by Friedrich Fulleborn, a Prussian physician.

Fulleborn studied medicine and natural sciences in Berlin. From 1896 onward, he was a military physician assigned to the Schutztruppe in German East Africa (Tanzania). In 1898-1900 he participated in the Nyassa- und Kingagebirgs Expedition to southern Tanzania, where he conducted anthropological and ethnographic research. He also collected bird specimens, which he sent to Berlin. He found the type of the Olive-headed Weaver near the source of the Rovuma River while near Songea.

The first illustration of the Olive-headed Weaver was of an adult, published by Reichenow (1902). The next illustration was published much later by Mackworth (1955).

Scientific citation

Symplectes olivaceiceps Reichenow 1899a, Ornithol. Monatsber. 7:7, Songea, Tanzania.

Meaning of names

olivaceiceps, Modern Latin: olivaceus, olivaceous; L. -ceps, headed.

First English name

Olive-headed Golden Weaver (Shelley 1905b).

Alternate names

Olive-headed Golden Weaver.

Collector

Friedrich Fulleborn.

Date collected

1898.

Locality collected

Songea, Tanzania.

Type specimens

The type is in the Berlin Museum (ZMB_47.105).

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 [216] - Discovery [99]: Olive-headed Weaver on 2016-08-03

1. Basic biology

Olive-headed Weaver
Olive-headed Weaver,
figure from wikipedia
Olive-headed Weaver
Olive-headed Weaver adult,
figure from PHOWN
Identification. The Olive-headed Weaver is a miombo weaver typically seen foraging quietly in the canopy, and occurring in eastern Africa. The male Olive-headed Weaver is slender-billed with a distinctive golden crown, olive face, throat and upperparts, orange-chestnut lower throat and breast; the upperparts are plain, and wings and tail dark; and the eye is red.

The female has a wholly olive head, and less chestnut on the breast. The juvenile is similar to the female but with a yellow chin and throat. The poorly-known Usambara Weaver is similar to this species, but their ranges do not overlap.

Olive-headed Weaver map

Distribution. The Olive-headed Weaver occurs in Tanzania, east Zambia, Malawi and Mombique (see map left, based on Birds of Africa). The northern-most record (from Mwamazengu, Tanzania) is from as recently as 1998. The southern Mozambique population has been described as a subspecies but the description was based on inadequate comparative specimens, and thus the species is treated as monotypic.

The isolated population near Panda in southern Mozambique is separated by more than 600 km from any other known sites. There are about 100 pairs in the Panda area compared to a global population estimate of about 20000 pairs (1998). This species is near threatened, but the situation may worsen with increasing habitat loss.

Habitat. The Olive-headed Weaver inhabits mature miombo (Brachystegia) woodland where Usnealichen is abundant.

Food. The Olive-headed Weaver feeds on insects, including butterflies and moths, beetles, bugs, and small wasps. It forages on tree trunks, clinging to the bark, and moving along the under and upper surfaces of branches, probing almost entirely in lichens. It is usually solitary or found in pairs, even when foraging in mixed bird parties.

Olive-headed Weaver
Olive-headed Weaver nest,
figure from PHOWN

Breeding. The Olive-headed Weaver is a monogamous, solitary nester, and the pair remains together all year. The nest is constructed entirely of Usnea, and is always placed in a thick clump of lichen, using living strands growing on a branch as a basis. The nest is placed on the underside of a thick branch rather than the tips of twigs. The nest is sited up to 18 m above the ground, generally near the crown of a tree. A short spout is usually added to the nest, but some nests lack a spout. Both male and female build the nest.

Eggs are plain turquoise-blue or white. Incubation and feeding of chicks is by both sexes, but much more by the female in both cases. Bohm's Flycatchers may breed in old Olive-headed Weaver nests.

The above is based on Weaver Wednesday, a weekly series about weaver species.
This species text first appeared as Weaver Wednesday [53]: Olive-headed Weaver on 2013-06-19

2. Breeding facts

Pair bond
Monogamous, pair-members remaining together throughout year
Breeding season
Oct in Zambia, Sept-Oct in Malawi and Aug-Oct in Mozambique
Nest site
attached to branch being utilized as a base on underside of thick branches (not outer twigs), up to 18 m above ground and mostly near crown of tree
Nest building
built by both sexes
Colony size
Solitary nester
Clutch size
2-3 eggs
Egg colour
plain turquoise-blue or white
Egg size
average size of three eggs 20 x 15 mm (Malawi)
Incubation
incubation by both sexes, but male only occasionally sitting, no information on duration of incubation period
Chicks and nestling period
chicks fed by both sexes, female contributing more than male, no information on duration of nestling period

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

3. Photos of Weaver Nests


Vm 14543

Vm 14542

Vm 13913

Vm 1989

Vm 1420

Vm 1419

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

Not South African species

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 n/a