Turdus poliocephalus
The Tasman Sea Island Thrush (Turdus poliocephalus), often simply called the Island Thrush, is a remarkably polytypic passerine, exhibiting one of the most extensive geographical and morphological variations within the Turdidae family. Ranging from 23 to 27 cm in length and weighing between 50 to 100 grams, this medium-sized thrush typically presents a dark, often olive-brown to blackish plumage. A distinctive pale or yellow eye-ring, coupled with a bright yellow or orange bill and legs, serv...
Primarily inhabiting tropical and subtropical forests, woodlands, and scrub, the Tasman Sea Island Thrush is highly adaptable to disturbed habitats, including gardens and plantations. It can be found from sea level to high elevations in mountainous regions, depending on the island.
Omnivorous, its diet primarily consists of insects, earthworms, snails, and other invertebrates, supplemented extensively with fruits and berries. It mostly forages by gleaning from the ground or plucking from vegetation.
Diurnal by nature, the Tasman Sea Island Thrush is most active during the early morning and late afternoon, often engaging in ground foraging. It primarily feeds by gleaning invertebrates from leaf litter and soil, but also ascends trees and shrubs to consume fruits and berries. During the breedi...
The Tasman Sea Island Thrush exhibits an exceptionally widespread and fragmented distribution across numerous islands of the Indo-Pacific realm. Its range extends from Southeast Asia, specifically Christmas Island in the Indian Ocean, through New Guinea, and extensively across the Southwest Pacif...
Least Concern
- The Tasman Sea Island Thrush boasts over 50 recognized subspecies, making it one of the most polytypic bird species globally. - Its extreme morphological and genetic variation across islands has led some ornithologists to consider it a "superspecies," a complex of incipient or cryptic species. ...