Ajfk. Craig et Pe. Hulley, SUPPLEMENTARY HEAD MOLT IN CAPE WHITE-EYES - A CONSEQUENCE OF NECTAR FEEDING, Journal of field ornithology, 67(3), 1996, pp. 358-359
Cape White-eyes (Zosterops pallidus) frequently feed on nectar during
early winter. This feeding can leave feathers on the forehead matted w
ith nectar and pollen. At least some individuals then shed these feath
ers, at a time when the annual complete molt has already been terminat
ed. It is suggested that such localized replacement of fouled plumage
may occur regularly both, in while-eyes and in other short-billed nect
ar-feeders.