Orange River White-eye (Zosterops pallidus)

Captured close to Orange river, the border between South Africa and Namibia.

Wikipedia: "Traditionally, the western nominate group and the eastern capensis group have been treated as separate species; the Orange River White-eye (Z. pallidus) and the Cape White-eye (Z. capensis). The latter can be further divided into two subgroups, the south-western capensis subgroup and the eastern virens subgroup (the so-called Green White-eye). All subspecies interbreed where they come into contact (including members of the nominate group with members of the capensis group of both subgroups in Free State), but some authorities (e.g. IOC) maintain the Cape and Orange River White-eyes as separate species."

Bird Forum Opus treats them as subspecies of Zosterops pallidus.

I follow here IOC definition, due to coloring and distribution.