حلقه چشمی

thumb|right|207px|Zosterops|White-eyes are named for the conspicuous white eye-rings found in the majority of species. Their genus name Zosterops likewise means "eye-girdle". The eye-ring of a bird is a ring of tiny feathers that surrounds the orbital ring, a ring of bare skin immediately surrounding a bird's eye. The eye-ring is often decorative, and its colour may contrast with adjoining plumage. The ring of feathers is sometimes incomplete, forming an eye arc. In the absence of a conspicuous eye-ring, the orbital ring of a bird is often referred to as the eye-ring. The bare orbital ring ma