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Island Thrush

Turdus poliocephalus

The Island Thrush, Turdus poliocephalus, presents a kaleidoscope of plumage across its numerous subspecies. This forest-dwelling bird is part of the extensive Turdus genus, known for its global distribution. With a general thrush-like appearance, the Island Thrush typically sports a yellow bill, eye-ring, and legs, though its overall coloration varies widely among the nearly 50 subspecies.

Identification Tips

Identifying the Island Thrush can be a challenge due to the significant variation in plumage among its subspecies. Some resemble the familiar Blackbird, while others, like T. p. seebohmi, have a striking red breast akin to the American Robin. Certain subspecies boast a completely white or orange head, adding to the identification puzzle.

Habitat

The Island Thrush inhabits a range of forested environments across its distribution. On larger islands, it is typically found at higher altitudes above 2750 meters, while on smaller islands, it may occur at lower elevations.

Distribution

This species is patchily distributed across the Pacific, from Southeast Asia to Samoa, including Fiji, Vanuatu, New Caledonia, the Solomon Islands, New Guinea, various Indonesian islands, and the Philippines. Its presence is often limited to areas with smaller bird communities.

Behaviour

The Island Thrush is known for its foraging behavior, reminiscent of the Blackbird, as it sifts through leaf litter and explores low branches in dense cover. In some locales, it may also forage in the canopy.

Song & Calls

The vocalizations of the Island Thrush are as varied as its subspecies, with each island population contributing its unique chorus to the avian symphony.

Breeding

Breeding seasons for the Island Thrush are localized and can range from two to three months, with some populations in Fiji nesting from June to January. They construct well-hidden, sturdy cup nests in dense vegetation and lay one to three eggs.

Similar Species

Due to the Island Thrush's varied appearance, it can be mistaken for other thrush species, including the Blackbird and the American Robin, depending on the subspecies in question.

Diet and Feeding

The Island Thrush has an eclectic diet, consuming invertebrates like insects, spiders, snails, and earthworms, as well as fruit, seeds, carrion, and occasionally small reptiles.

Conservation status

The Island Thrush as a whole is not considered threatened, with many subspecies thriving locally. However, certain subspecies face critical threats, such as T. p. erythropleurus on Christmas Island, imperiled by invasive yellow crazy ants. Three subspecies have sadly succumbed to extinction, largely due to human-induced factors like habitat loss and introduced predators.

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Island Thrushes on Birda

Photos

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A photo of a Ruddy-capped Nightingale-Thrush (Catharus frantzii)

Ruddy-capped Nightingale-Thrush

Catharus frantzii
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