Head deep in the burrow feeding the female inside then flies to the left to perch on a branch, Great Pied Hornbill Buceros bicornis, Khao Yai National Park, Thailand

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