The Collared Imperial Pigeon, (Ducula mullerii), is a large (40 cm in length, 600 g in weight) pigeon with grey upperparts and largely grey-pink underparts, distinguished by a striking and diagnostic complete black collar against an otherwise white throat.

Distribution

Northern and southern New Guinea

New Guinea

New Guinea is the world's second largest island, after Greenland, covering a land area of 786,000 km2. Located in the southwest Pacific Ocean, it lies geographically to the east of the Malay Archipelago, with which it is sometimes included as part of a greater Indo-Australian Archipelago...

 and the Aru Islands

Aru Islands

The Aru Islands are a group of about ninety-five low-lying islands in the Maluku province of eastern Indonesia. They also form a regency of Indonesia.-Geography:...

. It has been recorded from Boigu and Saibai Islands, Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

n territory in northern Torres Strait

Torres Strait

The Torres Strait is a body of water which lies between Australia and the Melanesian island of New Guinea. It is approximately wide at its narrowest extent. To the south is Cape York Peninsula, the northernmost continental extremity of the Australian state of Queensland...

.

Diet

Fruit from forest trees and insects. In the Port Moresby

Port Moresby

Port Moresby , or Pot Mosbi in Tok Pisin, is the capital and largest city of Papua New Guinea . It is located on the shores of the Gulf of Papua, on the southeastern coast of the island of New Guinea, which made it a prime objective for conquest by the Imperial Japanese forces during 1942–43...

 area, the main food during June/July was reported to be fruit of Tristiropsis canarioides which made up nearly half the diet. Some 30% of food volume were Ylang-ylang

Ylang-ylang

Cananga odorata, commonly called Ylang-ylang , cananga tree, ilang-ilang, kenanga , fragrant cananga, Macassar-oil plant or perfume tree),is a tree valued for its perfume...

 (Cananga odorata) fruit, the remainder being various Arecaceae

Arecaceae

Arecaceae or Palmae , are a family of flowering plants, the only family in the monocot order Arecales. There are roughly 202 currently known genera with around 2600 species, most of which are restricted to tropical, subtropical, and warm temperate climates...

(palm) fruits. Fruits eaten had a volume between 2 and 5 cm³, which would mean a diameter of about 1,5–2 cm in spherical fruit. Food is swallowed whole.(Frith et al. 1976)