Plain White-eye Zosterops hypolais

This small warbler-like bird is unremarkable in appearance, but surely not the plainest of the white-eyes; look for a pale eye with a very narrow white eyering, grayish upperparts, and contrasting pale yellow throat. Endemic to the island of Yap, in the Western Caroline Islands of Micronesia, where it inhabits a wide range of forested and brushy habitats. The only other white-eye on the island, Yap White-eye, is dark olive-brown overall and has a much more prominent eyering. Forages actively in flocks. Gives high-pitched, scratchy trills and chirrups, comparable to parakeet and sparrow calls.