The helmeted hornbill (Rhinoplax vigil) is a very lg bird found on the Malay peninsula, Sumatra & Borneo. The call is described as hoots followed by maniacal laughter. It eats mostly fruit, especially figs. It may also use the casque as a weighted tool to dig into rotten wood & loose bark in search of insects & similar prey. Unlike many fruit-eating hornbills, it is sedentary & pairs maintain a territory.