When someone tells you they're about to perform a Maori song, you don't usually expect drums, electric guitar, and head banging.
Northland band Alien Weaponry have put a twist on the traditional Maori waiata with what they believe may be the first heavy metal song in te reo Maori - Ruana Te Whenua.
"If you think about haka how similar is it to metal? It is really really similar to metal with the intensity and the emphasis on how loud and heavy it is and how much it punches you in the chest," said 15-year-old drummer Henry de Jong.
"The haka was designed to scare off the enemy and we've been at some gigs where bands have scared people off," added his brother - guitarist and vocalist Lewis de Jong, 13.
The two brothers are of Ngati Pikiao and Ngati Raukawa descent. They both went to full Maori immersion kura when they were younger and both parents, including their Dutch mother, speak fluent te reo Maori. The third member Ethan Trembath, 13, who plays bass is also of Maori descent.