Perched on a branch then the female sticks its head out from the burrow then the male flies away, Great Indian Hornbill Buceros bicornis, Khao Yai National Park, Thailand

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