New Zealand's Southern Wilderness
NASA highlights Stewart Island/Rakiura, New Zealand, for its biodiversity, dark-sky sanctuary status, and ongoing predator eradication efforts to protect native wildlife.
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Stewart Island/Rakiura, New Zealand’s third-largest island, is home to thousands of Stewart Island tokoeka, a subspecies of the Southern brown kiwi, alongside a human population of about 500. The island’s Rakiura National Park covers 85 percent of its land, featuring ancient podocarp forests, shrublands, wetlands, and coastal dunes like Mason Bay. These ecosystems support diverse birdlife, including the rare kākāpō, the world’s heaviest flightless parrot, and species such as bellbirds. Ulva Island, near Halfmoon Bay, has been predator-free since 1997, serving as a model for conservation efforts on the larger island.
Conservationists are expanding predator control on Stewart Island/Rakiura, targeting rats, possums, feral cats, and hedgehogs to protect native species. The island’s Māori name, Rakiura—meaning “glowing skies”—reflects its reputation for aurora australis displays, particularly in the southern half. The northern forests, dominated by coniferous trees with ancient lineages, provide critical habitats for birds and other wildlife. These efforts aim to preserve the island’s ecological integrity amid ongoing environmental challenges.
Stewart Island/Rakiura was designated an International Dark Sky Sanctuary in 2019, offering exceptional night-sky viewing opportunities. Residents and visitors can observe stars, auroras, and nearby dwarf galaxies, including targets visible from the Southern Hemisphere. In May, targets like the Jewel Box star cluster and the elliptical galaxy Centaurus A, potentially formed by a galactic collision, were among those studied by NASA’s Hubble Space Telescope and visible from the island.
NASA’s Earth Observatory features Stewart Island/Rakiura as part of its ongoing documentation of Earth’s natural wonders. The island’s remote location and protected status make it a focal point for both ecological research and astronomical observation. Images and stories from the observatory highlight the island’s role in understanding biodiversity, dark-sky preservation, and environmental conservation efforts worldwide.