Zosterops
Zosterops (meaning "eye-girdle") is a genus of passerine birds containing the typical white-eyes in the white-eye family Zosteropidae. The genus has the largest number of species in the white-eye family. They occur in the Afrotropical, Indomalayan, and Australasian realms. Typical white-eyes have a length of between . Their most characteristic feature is a conspicuous white feather ring around the eye, though some species lack it. The species in this group vary in the structural adaptations of the tongue. The "Zosterops" ["griseotinctus"] group is an example of a "great speciator" inhabiting a vast area and showing  a remarkable morphological differentiation on islands, some of which maybe as close as apart. Systematics. The genus "Zosterops" was introduced by the naturalists Nicholas Vigors and Thomas Horsfield in 1827. The name combines the Ancient Greek words "zōstēros" "belt" or "girdle" and "ōpos" "eye". The type species was designated as the Malagasy white-eye by René Lesson in 1828. The results of a series of molecular phylogenetic studies published between 2014 and 2018 prompted a major revision of species limits, in which 10 new genera were introduced. In the reorganisation, the English names of three of the existing genera were  replaced. Additionally, a study on Sri Lanka white-eyes ("Zosterops ceylonensis") and Indian white-eyes ("Zosterops palpebrosus") suggests that the Sri Lanka white-eye is the root species and the origin of all "Zosterops species". This raises questions upon the former theory of Southeast Asian origin. Species. There are over 100 species in the genus. This includes three species (denoted by a dagger † in the list below) that have become extinct since the 16th century.