Orange River White-eye

The Orange River white-eye, Zosterops pallidus, is a small passerine bird adorned with a distinctive yellow throat and a supraloral stripe. Its upper parts are cloaked in pale olive green, while the flanks and sides of the breast exhibit a tawny buff hue, a feature that aids in its identification. Both sexes are similar in appearance, spanning 10-13 cm from the bill to the tail tip. The lore plumage and bare parts are a deep black, and the juvenile's plumage is a paler version of the adult's. The characteristic white eye-rings develop during the second month of life.

Identification Tips

To identify the Orange River white-eye, look for the yellow throat, the supraloral stripe, and the tawny buff tones on the flanks and sides of the breast. The black lore plumage and bare parts are also key features. Juveniles are paler but will develop the white eye-rings as they mature.

Habitat

This species thrives in a variety of habitats, including native and introduced willows, currant-rhus, thorn trees, and reeds. It is also a common sight in human-altered landscapes such as gardens, parks, and plantations, where it takes advantage of any available vegetation.

Distribution

The Orange River white-eye is native to Namibia and South Africa, with the highest densities found in the catchment areas of the Orange and Vaal Rivers. Its range extends to more isolated locations in the Nama Karoo, Namaqualand, Namib, Namibian escarpment, uplands of Damaraland, and mopane-veld in the far north.

Behaviour

These birds are known to glean insects from foliage and tree bark, and they also consume small fruit, including dry Searsia berries. Outside the breeding season, they form small foraging parties, following a leading bird in a loose procession. They may also mix with non-breeding Cape white-eyes. Their song is typically subdued and muted, except when excited, but a sustained warbling song can be heard during the breeding season.

Song & Calls

The usual song of the Orange River white-eye is subdued and muted, except when the bird is excited. During the breeding season, a sustained warbling song is produced.

Breeding

Breeding occurs during the summer months, although detailed information on their breeding habits is sparse. A clutch of three pale blue eggs has been recorded. The nest is a deep cup made of dry pliable plant material, suspended between horizontal twigs and reinforced with cobweb.

Similar Species

The Cape white-eye (Zosterops virens) is similar in appearance but can be distinguished by its different vocalizations and habitat preferences.

Diet and Feeding

The diet consists of insects gleaned from foliage and tree bark, as well as small fruits such as dry Searsia berries.

Conservation status

The Orange River white-eye is classified as Least Concern on the IUCN Red List, indicating that it currently faces no significant threats to its survival.