Faichuk White-eye as endangered bird of Nauru

Faichuk White-eye, (Rukia ruki) is a species of bird in the Zosteropidae family. It is endemic to the summit of Mount Winipat on Tol, in the Faichuk group of islands within the Chuuk (Truk) atoll in Federated States of Micronesia.
Its habitat is mountain rainforest dominated by the endemic Chuuk Poisontree. Due to it restricted range on one small mountaintop and the locals' disdain for the native poisontree, it is severely threatened by habitat loss. This species qualifies as Critically Endangered because Population estimated in the hundred, 530 birds, which is likely to be declining owing to continuing habitat loss. A large typhoon could plausibly lead to its extinction.
The species has characteristics are medium-sized 14 cm, all-dark, warbler-like bird, uniform dark-brown with black bill, orange legs and conspicuous white "teardrop" below the eye. The voice lively song and lilting warble very similar to song of Golden White-eye of the Marianas. Some advocate that it is the only true member of the genus Rukia, or the "Great White-eyes". It feeds by foraging for insects in the foliage.