The ecoregion includes several island groups lying east of the eastern peninsula of the island of New Guinea, within Milne Bay Province, including the d'Entrecasteaux Islands and Trobriand Islands archipelagoes, and Woodlark Island.
The ecoregion comprises a cluster of island groups situated east of the eastern extremity of the island of New Guinea, within Milne Bay Province, encompassing the d'Entrecasteaux Islands and Trobriand Islands archipelagos, and Woodlark Island.