Orange Weaver Ploceus aurantius

Weaver species list / RELATED SPECIES: Baglafecht Weaver / Bannerman’s Weaver / Bertram’s Weaver / Giant Weaver / Orange Weaver / Principe Golden Weaver / Vieillot’s Black Weaver / Weyns’s Weaver

IUCN: Least concern Discovery: 024

Categories: golden, wetland, fruit, waterbirds, palm

Discovery

Orange Weaver, figure from Vieillot 1805

Orange Weaver, figure from Vieillot 1805

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 [141] – Discovery [24]: Orange Weaver on 2015-02-25

1. Basic biology

Identification. The Orange Weaver Ploceus aurantius has a pale slender bill and reddish-brown or pale grey eye. The male is orange-yellow, sometimes with a black spot in front of the eye. The female and young birds are dull coloured. There is no seasonal change in plumage.

According to Nik Borrow, the eye colour of western Orange Weavers (aurantius) is red and those of Ugandan Orange Weavers (rex) is pale bluish (photos on facebook).

Distribution. The Orange Weaver is localized, often uncommon, and occurs from Sierra Leone in West Africa across to Lake Victoria, and south to northern Angola (see map above, based on Birds of Africa). Two subspecies of the Orange Weaver are recognised:
P. a. aurantius from Sierra Leone to DRC, and south to Angola (see red on map).
P. a. rex, around Lake Victoriain Uganda, Kenya and Tanzania (see blue on map). The male of this subspecies has a larger black area in front of the eye.

A third subspecies, P. a. royrei is not valid but the type may be viewed here.

In Liberia, Orange Weavers are found along the coast and on rocky islets up to 1.5 km offshore, where they nest low down in shrubs on the leeward side but commute to the mainland for foraging.

Habitat. The Orange Weaver inhabits mangroves, thickets in coastal lagoons, small creeks and estuaries in West Africa; inland it occurs along major rivers; and around Lake Victoria it is found in papyrus swamps.

Food. It feeds on fruit, including berries, fruit pulp and seeds; also insects, including adults and eggs of locusts, beetles, and caterpillars. It is usually found in pairs or small groups.

Breeding. The Orange Weaver is probably polygynous. It is colonial, and there may be between 12 and several hundred nests at some sites, but sometimes single nests. Nest sites include reeds, palms and other trees. It may form mixed colonies with other weavers.

The nest is built by the male. The nest is ovoid, with no entrance tunnel in central and West Africa, and with a short tunnel in Uganda. The nest is tightly woven from grass or palm strips.

The eggs (clutch of 2) are pale blue, green, brown or reddish, with fine lilac and brown spots, usually denser at the thick end. Incubation is by the female.

The above is based on Weaver Wednesday, a weekly series about weaver species.
This species text first appeared as Weaver Wednesday [51]: Orange Weaver on 2013-06-05

2. Breeding facts

Pair bond
Presumably polygynous

Breeding season
Oct-Apr in Liberia, Jun-Jul in Ghana and Togo, Feb, Jun, Sept and Nov-Dec in Nigeria, Oct-Mar in Gabon, Dec and Feb in PRCongo, possibly all months in DRCongo (Apr-Sept in Ituri, Jan in Itombwe), and Feb-May in Uganda

Nest site
placed 1.5-3 m above water in reeds or similar, up to 5 m over land in tree or bush; on offshore islets, low down in shrub on leeward side

Nest building
built by male

Colony size
Colonial, with several hundred nests at some sites, also isolated single nests

Clutch size
2 eggs

Egg colour
pale blue, green, brown or sometimes reddish, with fine lilac and brown spotting, denser at thick end

Egg size
average size 21 x 14.5 mm (Uganda)

Incubation
incubation by female, in captivity period 13-14 days

Chicks and nestling period
nestling period in captivity 13-16 days

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