Birds include the knobbed hornbill, Sulawesi hornbill and maleo. The knobbed hornbill is the faunal symbol of South Sulawesi province. As with other hornbills, the knobbed hornbill is believed to be monogamous. Flange maces did not become popular until after knobbed maces. The shell of most knobbed whelks is dextral, meaning that it is right-handed. Buttons are disc-shaped and pierced by four holes and may be smooth or knobbed. The agung is a knobbed metal gong of the Philippines used in various communal rituals. On the inside of the hatch was a knobbed plunger. The Pegasus appears to wear a cap from which rise two knobbed horns.