The Tongan Whistler is a species of bird

Bird

Birds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...

 in the Pachycephalidae

Pachycephalidae

The family Pachycephalidae, collectively the whistlers, includes the whistlers, shrike-thrushes, shrike-tits, pitohuis and Crested Bellbird, and is part of the ancient Australo-Papuan radiation of songbirds. Its members range from small to medium in size, and occupy most of Australasia...

 family. It is endemic to the islands of Vava'u

Vava'u

Vavau is an island chain of one large island and 40 smaller ones in Tonga. According to tradition Maui fished both Tongatapu and Vavau but put a little more effort into the former. Vavau rises 204 meters above sea level...

 and Late

Late (Tonga)

Late Island is an uninhabited volcanic island southwest of Vavau in the kingdom of Tonga.The small, 6-km-wide circular island of Late, lying along the Tofua volcanic arc about 55 km WSW of the island of Vavau, contains a 400-m-wide, 150-m-deep summit crater with an ephemeral lake...

 in Tonga

Tonga

Tonga, officially the Kingdom of Tonga , is a state and an archipelago in the South Pacific Ocean, comprising 176 islands scattered over of ocean in the South Pacific...

. It is mainly found in tropical primary forest, but can sometimes be seen in second growth or wooded plantations. It is similar to the Australian Golden Whistler in appearance, but the head and throat of the male is entirely black, and the underparts of the female are yellow. The Tongan Whistler is threatened by habitat loss.