Protecting the Tītī (Sooty Shearwater) of Kāpiti Island

Kāpiti Island, New Zealand
  • Conservation
  • Wildlife

Project overview

In December 2021, a four-year conservation project began on Kāpiti Island to save its dwindling tītī (sooty shearwater) (Ardenna grisea) population. While tītī are not endangered nationally, their colony on Kāpiti is near the point of collapse — a major concern for local iwi, for whom the species is a taonga (treasure), and for the island’s ecological health.

The decline is thought to be driven by predation from weka (Gallirallus australis), another treasured native bird, which dig into tītī burrows to eat chicks. This loss not only impacts the tītī population but also disrupts the nutrient cycle and biodiversity of the island’s ecosystem.

Our Impact

WildArk, alongside Kāpiti Ice Cream, is partnering with the Department of Conservation to support research that will:

  • Identify the drivers of tītī population decline on Kāpiti Island.
  • Test and trial exclusion methods to protect chicks from weka predation.
  • Compare breeding success with nearby Mana Island, where tītī numbers are increasing thanks to predator removal.
  • Incorporate Mātauranga Māori (indigenous knowledge) to guide culturally and ecologically respectful management.

This collaborative “e rua ngā takere” (two hulls) approach blends Western science with indigenous wisdom, ensuring conservation outcomes honour both ecological needs and cultural heritage.

Project Actions

  • Monitoring & Research – Scientists and DOC staff are tracking nesting success over multiple breeding seasons, using both Kāpiti and Mana Islands as study sites.
  • Predator Management – Trialling innovative, humane methods to prevent weka from accessing tītī burrows.
  • Knowledge Sharing – Partnering with iwi and supporting tertiary students to conduct field research, strengthening local conservation capacity.
  • Public Awareness – Sharing project progress through community updates and social media.
Film: Kāpiti x WildArk tītī bird conservation
Film: Kāpiti x WildArk tītī bird conservation

Why It Matters

By the project’s completion, the aim is to restore a healthy, self-sustaining tītī colony on Kāpiti Island, strengthening its role as a vital seabird stronghold and cultural taonga — and helping to preserve the island’s rich biodiversity for future generations.

Project photo Gallery

Project partner

Kāpiti Ice Cream

‘Where Nature meets Indulgence’
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The philosophy behind Kāpiti and its commitment to excellence remains the same. Taking the purest ingredients inspired by the natural environment found at the bottom of the earth, creating amazing ice cream that will take you on an incredible journey from first to the last bite.