The cones are in diameter, and can weigh as much as 18 kg (40 lb) and are opened by large birds, such as cockatoos, or disintegrate when mature to release the large seeds or nuts. there are no reported dispersal agents for the seeds of "A. bidwillii", macropods and various species of rats are known as predators of the seeds and tubers. The bush rat ("Rattus fuscipes") was observed caching bunya seeds some distance uphill from parent trees, possibly allowing ridge-top germination. Brushtail possums ("Trichosurus spp.)" were mentioned as carrying the seeds up trees. In a study in 2006, the short-eared possum ("Trichosurus caninus") was shown to disperse the seed of "A. bidwillii".