What does a huhu grub turn into?

A huhu grub, which is the larval stage of the huhu beetle (Prionoplus reticularis), eventually transforms into an adult beetle. After several weeks of feeding and growing, the grub undergoes metamorphosis, pupating in a protective cocoon before emerging as a mature beetle. The adult huhu beetle is known for its distinctive dark green or black color and is primarily found in New Zealand.