Qualla: Manawatawhi / Three Kings Islands: New Zealand's Evolutionary Outpost

Manawatawhi / Three Kings Islands: New Zealand's Evolutionary Outpost: Introduction

Mon, 09 Mar 2026 00:00:00 GMT

Photo credit Public domain. Some of the creatures on these islands have closer genetic relatives in Australia and New Caledonia than in the New Zealand that lies just 55 kilometers to the southeast. The Manawatawhi / Three Kings Islands are a group of thirteen uninhabited islands perched on a submarine plateau where the South Pacific Ocean and the Tasman Sea collide. During the Last Glacial Maximum, when sea levels dropped more than 100 meters and most of New Zealand's offshore islands reconnected to the mainland, the Three Kings remained cut off. An 8-kilometer-wide submarine trough, 200 to 300 meters deep, kept them isolated. They have been on their own for a very long time.

Image: Public domain

Manawatawhi / Three Kings Islands: New Zealand's Evolutionary Outpost: Deep Time on a Small Rock

Mon, 09 Mar 2026 00:00:00 GMT

Photo credit Peter Southwood, CC BY-SA 3.0. Genetic studies of insect populations on the Three Kings have produced separation dates ranging from 24 million years ago to 2.24 million years ago, depending on the species. That range tells a story in itself: different lineages arrived at different times, by different means, an...

Image: Peter Southwood | CC BY-SA 3.0

Manawatawhi / Three Kings Islands: New Zealand's Evolutionary Outpost: The Last Glimpse of the Living World

Mon, 09 Mar 2026 00:00:00 GMT

Photo credit Defense Mapping Agency, Public domain. In Maori mythology, Ohau, the westernmost of the islands, holds a role of profound spiritual weight. It is the final glimpse of New Zealand that departing spirits see after leaving the world at Cape Reinga / Te Rerenga Wairua. The spirits travel north from wherever they died, gat...

Image: Defense Mapping Agency | Public domain

Manawatawhi / Three Kings Islands: New Zealand's Evolutionary Outpost: Rocks Without Beaches

Mon, 09 Mar 2026 00:00:00 GMT

Photo credit Department of Scientific and Industrial Research, CC BY 4.0. The geography of the Three Kings is inhospitable by any standard. The islands rise steeply from King Bank, a submarine plateau surrounded by extremely deep water. There are no beaches, just cliffs dropping into turbulent seas. Four main islands and a scattering of smaller rocks m...

Image: Department of Scientific and Industrial Research | CC BY 4.0

Manawatawhi / Three Kings Islands: New Zealand's Evolutionary Outpost: Goats and Conservation

Mon, 09 Mar 2026 00:00:00 GMT

Photo credit Vallee, CC BY-SA 4.0. Rats and mice, the usual destroyers of island ecosystems, were never introduced to the Three Kings. Goats were not so lucky an omission. Introduced to Great Island at some point in the past, they caused significant damage to the vegetation and soil before conservation efforts int...

Image: Vallee | CC BY-SA 4.0