Trogons display remarkable aerial agility and are even capable of hovering for brief periods, a skill the Javan trogon employs to pluck fruits and insects off foliage and branches (3) (4). Returning to its perch, food is swallowed whole, regurgitating seeds once the nutritious flesh has been digested (3). Medium to large insects, such as caterpillars and beetles, and various fruits form the bulk of the diet, but the Javan trogon may also eat small vertebrates, such as lizards and frogs, using its powerful bill to kill prey (2) (3).
Very little is known about the breeding biology of the Javan trogon, but it is suspected to breed between April and December at the outset of the wet season in West Java (2). Nests are constructed in old woodpecker holes or cavities are excavated within arboreal termite nests or rotten tree trunks (3). A clutch of one or two eggs is laid and, in common with other trogons, the eggs are incubated by both parents (2) (3). The parents also cooperate in the care of the young chicks, which become independent several weeks after fledging (3).