New Zealand’s Southern Wilderness

Earth Observatory Science Earth Observatory New Zealand’s Southern… Earth Earth Observatory Image of the Day EO Explorer Topics All Topics Atmosphere Land Heat & Radiation Life on Earth Human Dimensions Natural Events Oceans Remote Sensing Technology Snow & Ice Water More Content Collections Global Maps World of Change Articles Earth Matters Blog Blue Marble: Next Generation EO Kids Mission: Biomes About About Us Subscribe 🛜 RSS Contact Us Search Stewart Island/Rakiura, New Zealand’s third largest and southernmost inhabited island, appears in a rare, mostly cloud-free image acquired with the OLI (Operational Land Imager) on Landsat 9 on May 14, 2026. NASA Earth Observatory/Michala Garrison Stewart Island/Rakiura is the third-largest island in New Zealand, diminutive in comparison to the country’s North Island and South Island . Yet it hosts a population of one of the largest of the kiwi: the Stewart Island tokoeka .

This flightless bird, a subspecies of the Southern brown kiwi (Apteryx australis) , numbers in the thousands on the island, dwarfing its human population of approximately 500 . The avian national icon is just one slice of the natural riches on Stewart Island/Rakiura, a roughly triangular piece of land about 30 kilometers (19 miles) south of the South Island. Rakiura National Park covers about 85 percent of the bright green island.

And as the Māori name—Rakiura, meaning “ glowing skies ”—suggests, it’s a prime location for viewing the aurora australis. On the northern half of the island, podocarp and hardwood forests featuring coniferous trees with ancient lineages blanket the land. Other areas are covered in shrublands and wetlands, as well as coastal dunes such as those lining Mason Bay .

A diversity of birdlife, including the kiwi, populates these relatively untouched ecosystems. The tall trees of the podocarp forests produce various fruits attractive to avian inhabitants, such as bellbirds, with their pure-toned calls , and the rare kākāpō , the world’s heaviest and only flightless parrot species. Waves wash onto the rocky shore of Stewart Island/Rakiura near Halfmoon Bay on July 3, 2010.

Lindsey Doermann One notable haven for birds lies on Ulva Island, located within the inlet near Halfmoon Bay (Oban). Rats, which once preyed on bird eggs and chicks there, were deemed eradicated in 1997 , and the island has mostly remained free of non-native predators. Conservationists have since embarked on a project on the much larger Stewart Island/Rakiura to eliminate rats, possums, feral cats, and hedgehogs.

When darkness falls, Stewart Island/Rakiura’s human denizens can look skyward for the chance to observe stars, auroras , nearby dwarf galaxies , and other features of the Southern Hemisphere night sky. In 2019, the remote and sparsely inhabited island was designated an International Dark Sky Sanctuary . Amateur astronomers there and in other places with good night-sky views might search for objects of interest through Hubble’s Night Sky Challenge .

In May, when this image was acquired, targets imaged by NASA’s Hubble Space Telescope that were also visible from Earth’s southern latitudes included a star cluster called the Jewel Box and a peculiar elliptical galaxy known as Centaurus A , which may have resulted from two galaxies colliding. S. Geological Survey .

Photo and story by Lindsey Doermann. 82 MB) References & Resources DarkSky International (2019, January 3) Stewart Island / Rakiura . Accessed July 29, 2026.

The Guardian (2022, July 6) New Zealand to embark on world’s largest feral predator eradication . Accessed July 29, 2026. New Zealand Department of Conservation, Birds .

Accessed July 29, 2026. New Zealand Department of Conservation, Podocarp-hardwood forests . Accessed July 29, 2026.

New Zealand Department of Conservation, Stewart Island/Rakiura . Accessed July 29, 2026. You may also be interested in: Stay up-to-date with the latest content from NASA as we explore the universe and discover more about our home planet.

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