A male great hornbill is cleaning the small opening of the cavity of a tree where the female great hornbill Buceros bicornis is nesting, inside Khao Yai National Park in Nakhon Ratchasima, Thailand

great hornbill buceros bicornis concavecasqued hornbill great indian hornbill great pied hornbill vulnerable thailand khao yai national park asia southeast asia feeding trees forest rainforest kerala state bird birds animals frugivorous horned like twohorned nesting wood cavity wings black yellow green branches woodlands forage figs fruits insects nature natural habitat wildlife tropical casque regurgitating vines leaves india nepal bhutan