The casque, the large structure on top of the beak, is unique to hornbills. It takes five to six years for it to fully develop.
Many birds nest in cavities, but only the hornbill seals herself into the nest with mud and feces, leaving a narrow slit through which her mate passes food. She may stay sealed inside with her brood for 100 days.
HABITATDense lowland forest
DIETInsects, small vertebrates, and fruit