It is found in rainforest and, to some extent, in secondary regrowth dominated by the introduced Japanese cherry Muntingia calabura. Surveys in 2005 and 2006 found the species to be more common in evergreen forest than in either semi-deciduous forest or cleared areas (James and Retallick 2007). It nests in the top of rainforest trees and other dense vegetation, and feeds on native and exotic fruits, as well as buds and leaves.

Ducula whartoni is endemic to Christmas Island (Australia), in the Indian Ocean.

Conservation Actions Underway
The Christmas Island National Park was established in 1980, and has since been extended to cover more than 60% of the island (D. James in litt. 2007). Although not subject to specialised study, ongoing and sporadic monitoring is likely to detect if there are population declines in the future.

Conservation Actions Proposed
Continue to monitor population trends through standardised or incidental surveys. Eradicate black rats from the island, and control or eradicate feral cats. Create a multi-stakeholder team with responsibility for ensuring the conservation of threatened species on Christmas Island.