The largest of Milne Bay's four main island clusters, D'Entrecausteaux boasts volcanically active islands, superb geothermal fields, and remnants of the WWII Allied Battle of New Guinea.
The D'Entrecausteaux Islands is home to five main islands - Normanby (Duau) Island, Fergusson (Morima) Island, Goodenough (Nidula) Island, Sanaroa (Welle) Island, and Dobu Island.
The island cluster was named after French Explorer Antoine Bruni d'Entrecasteaux who passed through in 1792. D'Entrecausteaux is home to a variety of diverse species inhabiting some of the world's most beautiful and untouched natural settings and habitats.
Normanby Island is a volcanic 1,000-square-kilometre (390 sq mi), L-shaped island, the southernmost island in the D'Entrecasteaux Islands group. In 1873, the island was visited by British Captain John Moresby, commanding HMS Basilisk, who named it after the Marquess of Normanby, George Augustus Constantine Phipps, a governor of Queensland, Australia.
Fergusson Island is the largest island of the D'Entrecasteaux Islands. It has an area of just over 500 square miles (1,437 km2), and mostly consists of mountainous regions, covered by rain forests. There are three large volcanoes on the island. The island was named by Captain John Moresby after Sir James Fergusson, who was Governor-General of New Zealand from 1873 to 1874.