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The Zosteropidae are small, nine-primaried oscines with slender, usually straight or slightly decurved bills, operculate nostrils and a bifid, protractile tongue each half of which is laciniate in many species. The wings are short, the tail short and square. The tarsus has a few scales in front and the outer toes are partially united. The plumage tends to be yellowish or greenish above and whitish, brownish or gray below. Most species have a circumorbital ring of small white feathers. The sexes are alike. The 80 species occur from Africa to Asia and Australasia.