An unsolved mystery that left commuters puzzled back in 2015 as come back to haunt them.
It's the mystery of the severed possum tail – hundreds of them – littered over roads in the central and far north of the North Island.
Commuters have taken to Facebook to share photos and discuss possible explanations.
Sightings of tails have been reported in locations around the North Island, including Ohakune and Mangaweka, Te Awamutu, Dome Valley, Kaitaia and as far north as Te Kao and Pukenui.
On Facebook, some believe the tails were deliberately placed in regular intervals along the road and could be an act of protest.