The Green Warbler, known scientifically as Phylloscopus nitidus, is a captivating species of leaf warbler. It is also referred to as the Green Willow Warbler or Green Leaf Warbler. This bird is a member of the Phylloscopidae family, a group that was once part of the broader "Old World warbler" assemblage. The genus name Phylloscopus is derived from the Ancient Greek words for "leaf" (phullon) and "seeker" (skopos), while the specific name nitidus means "shining" in Latin, reflecting the bird's bright plumage.
The Green Warbler can be distinguished by its bright coloration compared to its close relative, the Greenish Warbler. It exhibits a more vivid yellow underside and has a strong wing bar accompanied by a fainter one, particularly noticeable in juvenile birds.
This species is native to the Caucasus Mountains, nestled in the southeastern part of Europe.
The Green Warbler is found in the Caucasus region, which straddles the intersection of Europe and Asia.
The Green Warbler is most closely related to the Greenish Warbler, though it is notably brighter in color with a more pronounced yellow underside.
The IUCN Red List has classified the Green Warbler as Least Concern, indicating that currently, there are no immediate threats to its population levels that would warrant a higher risk category.