Isn’t burong undan also called tajai?
22. Burong undan is the Wreathed hornbill (Aceros undulatus, Shaw). This bird has special spiritual associations to the Iban. Its spiritual home is mentioned in the timang (along chants of the Gawai Antu) and it figures as a messenger that carries food oflerings to the spirits of the dead at the end of the initial period of mourning (pana).