Of the general plants they eat, the most common types are Canarium (Burseracea), Cryptocarya, Ocotea, Ravensara (Lauraceae), Ficus (Moraceae), Eugenia/Syzygium (Myrtaceae), and Grewia (Tiliaceae).
Canarium acutifolium is a forest tree species, of the plant family Burseraceae, growing naturally in New Guinea, the Moluccas, Sulawesi, New Britain, New Ireland, Bougainville and in lowland north-eastern Queensland, Australia.
The Palm Cockatoo is often observed feeding during the early hours of the day on a diet that consists mostly of wild growing Pandanus palm fruit and nuts from the Kanari tree, Canarium australasicum.