The Mussau Triller occurs on Mussau Island in Papua New Guinea. It has a chestnut breast, eats fruit and insects, and was found in forest at the island's center.
Its breast is chestnut-colored.
A 2024 expedition found it in dense forest with tall trees in the center of the island; the IOU briefing reports fruit and insects in its diet.
An extinction-risk assessment has not been added yet.