Great Hornbill Buceros bicornis two individuals perched while the one on the left moves its head down and up, the other looks around, Khao Yai National Park, Thailand

hornbills great hornbill concavecasqued hornbill buceros bicornis fruiting tree bucerotidae yellow bill birds nest fruits frugivorous foraging nesting bucerotiformes tropical forest frugivore conservation khao yai habitat perch large bird southeast asia bird in the habitat anthracoceros rainforest national park plumage thailand branch tree jungle nature semievergreen feathers longlived insectivore world heritage unesco vulnerable tropical forest wings great indian burrow massive bill fishing pied black casque indian subcontinent