The Tuku Nature Reserve lies in the Tuku-a-tamatea (Tuku) River Valley in the south-west of the island of Rekohu, the main island in New Zealand’s Chatham Islands group in the south-west Pacific Ocean. It is important for the conservation of the critically endangered Magenta Petrel (Pterodroma magentae), or Chatham Island Taiko, a small burrow-nesting seabird.