Cape Weaver

Identification

The Cape weaver is a compact 17 cm bird with a distinctive pointed conical bill and streaked olive-brown upperparts. Males in breeding plumage are unmistakable, displaying a bright yellow head and underparts contrasted with an orange face and striking white iris. Females are more subtly coloured, with olive-yellow heads and breasts that shade to pale yellow on the lower belly, and typically have brown eyes—though about 19% show pale eyes in summer, making eye colour an unreliable field mark for sexing. Young birds resemble females. The species' harsh, hysterical sizzle song, sharp double-chip alarm call, and distinctive "azwit" contact call are useful for identification by ear.

Range & Habitat

The Cape weaver is endemic to South Africa, Lesotho and Eswatini, with a distribution spanning much of the region from the Orange River in the Northern Cape south to the Cape of Good Hope, then eastward to northern KwaZulu-Natal and inland almost to Bloemfontein in the Free State. The species notably avoids the Kalahari Desert. These birds favour open grasslands, lowland fynbos, coastal thicket and farmland, provided that permanent water and trees are present. In hotter, more arid regions they are restricted to upland areas, and they never occur in closed forest.

Behaviour & Diet

Cape weavers are highly social outside the breeding season, forming flocks and congregating in large roosts shared with other bird species. During breeding, males are territorial colonial nesters, typically forming colonies of 2 to 20 individuals. Each male is polygynous, potentially attracting up to seven females per breeding season, and constructs multiple nests within his defended territory. Males build distinctive kidney-shaped, fully waterproof nests from woven grass or reed strips in about a week, attaching them to tree branches—often exotic species like eucalyptus or willow—or to wetland vegetation, utility lines and fences near water.

The Cape weaver is omnivorous with an evenly balanced diet of animal and plant matter, including seeds, fruit, nectar, insects and spiders. They forage opportunistically on the ground, in foliage, by gleaning from bark and by hawking insects in flight. Their long bills are specially adapted for this dietary flexibility. Females enjoy more varied diets than males. These birds serve as major pollinators of aloes in South Africa and are generalist nectar-feeders.

Best Time & Places to See It

The Cape weaver is common throughout its range and can be found year-round, though breeding activity peaks from October to January in summer rainfall areas and August to October in the winter rainfall zone of the Western Cape. Look for them in open grasslands, coastal thickets, farmland and wetland areas where trees or tall vegetation stand near permanent water. Large roosts are a reliable place to observe them, particularly during non-breeding months. In agricultural regions of the Western Cape, they are so abundant they can become conspicuous pests in orchards.

Photography Tips

Breeding males in their bright yellow and orange plumage offer stunning photographic subjects, particularly during peak breeding season. Photograph them against the characteristic backdrop of their distinctive woven nests, which are themselves remarkable subjects. Early morning light will best render the males' vibrant colours and distinctive white irises. During non-breeding season, capture images of their gregarious behaviour at large communal roosts. The birds' active foraging behaviour—gleaning, hawking and probing flowers—provides excellent opportunities for action shots. Wide-angle compositions showing colonies of nests on trees or wetland vegetation convey the species' fascinating colonial breeding biology.