management area showed a preference for Dorcopsulus forest wallabies, which comprised 6 of 10 prey items. However, data do indicate the Papuan eagle is an opportunistic predator and can take a wide range of birds including pigeons and doves, hornbills, cockatoos, megapodes and juvenile cassowaries. Additionally, incidents of predation on reptiles such as snakes and monitor lizards are known. Additionally, Papuan eagles have been known to hunt small dogs and young pigs. Much of the recorded prey of Papuan eagles is fairly large, most species targeted by them weighing in adults or considerably more, a Matschie's tree-kangaroo weighing was recorded as prey of Papuan eagles. Singing dogs, established exotic wild animals analogous to Australia's dingos, are known to steal the bird's kills. An incident of the apparent act of predation by a Papuan eagle on a small child has been considered "thought authentic" by some authors and "very dubious" by others. The Papuan eagle was thought to become the only remaining top predator of the island after the extinction of local giant monitor lizards and possibly large carnivorous marsupials. It is not known how Papuan eagles co-exist with the similarly sized Gurney's eagles, which also frequents rainforest and appears to select somewhat similar prey, but the Gurney's seems more prone to appearing in lower elevation forests (i.e. reportedly very rare above and more likely to visit forest openings. Furthermore, the Gurney's eagle hunts in flight at or slightly above the canopy level (in keeping with its considerably longer wings than the Papuan), very different from any foraging mode utilized by the Papuan eagle. Very little is known about breeding or pairing behaviour in the Papuan eagle. What it is known suggests it is a typically solitary raptor and forms presumably stable breeding pairs. It appears to breed largely in the dry season, such as April to November. A specimen in breeding condition was recorded in June, actively nest building in April–May and having large nestlings in August. Large, emergent trees appear to be preferred, with some genera the eagles have been known to nest being Eugenia, Syzygium and Aglaia. Usually, trees selected are on a slope and the nest will be placed on a very large one right near the canopy, often over above the ground. Nests in one study were found to be in trees an average of taller than the surrounding trees in the forest, with fewer lower