Hine Raukatauri is the spiritual entity for Māori flutes. She is a daughter of Tāne Māhuta. The sound is an attempt to replicate the sound made by the empty cocoon of the case moth.
The kōauau pictured was made by Brian Flintoff, and gifted to Te Papa in 1997 as part of the Haumanu collection. It is carved from deer bone. The patterns link the carved faces to the fingerholes. The underside has a notched whakapapa (genealogy) that denotes the sound unique to this instrument.