Watching over its mate that is inside the hollow of a trunk of a big tree, Great Hornbill Buceros bicornis

great hornbill buceros bicornis bird asia southeast asia thailand tree leaves burrow hole trunk bark branches fly flight helmet bill feathers yellow white black beak serrated pneumatized bones forests fruits figs mammals disperser pollinator forgae hopping nest breeding feeding hollow incubation roosting vulnerable mountain woodlands conservation protected casque frugivore flaps wings tropical wildlife