About Phylloscopus nitidus Blyth, 1843
The green warbler, whose scientific name is Phylloscopus nitidus, is also called the green willow warbler or green leaf warbler. It is a species of leaf warbler that occurs in the Caucasus Mountains of southeastern Europe. Like all other leaf warblers, this species was previously classified within the broader "Old World warbler" grouping. It is now placed in the separate new leaf-warbler family Phylloscopidae. The genus name Phylloscopus comes from Ancient Greek: phullon means "leaf", and skopos means "seeker", which derives from skopeo meaning "to watch". The specific epithet nitidus comes from Latin, and it means "shining". This species is most closely related to the greenish warbler. Compared to the greenish warbler, the green warbler is brighter in colour, and its underside is much more yellow. It has one strong wing bar and one faint wing bar, a trait that is especially noticeable in young birds.