Motuara Island Nature Reserve: A Protected Bird Sanctuary in the Marlborough Sounds

Motuara Island's recorded history begins long before European contact, when the entrance to Queen Charlotte Sound served as a major route for waka crossing Cook Strait. Rangitāne people made the island and its surroundings a gathering place, trading pounamu from the South Island's west coast and pakohe from Nelson-Marlborough quarries. The fortified pā on the rocky outcrop now called Hippah Island, at Motuara's southeastern point, reflected the area's strategic importance, with different tribal groups contesting and merging over time.

The defining moment in the island's European history came on 31 January 1770, when James Cook, sailing on HMS Endeavour, climbed to the summit of Motuara and, in the presence of the local chief Topaa and other Rangitāne people, raised the Union Jack and claimed Queen Charlotte Sound for King George III. The act was carried out under sealed Admiralty orders that instructed Cook to take possession with the consent of the natives if they were present, a consent the Māori present did not understand as cession of sovereignty. Encounter between the Europeans and Māori at the island was smoothed by Tupaia, the Tahitian priest and interpreter who travelled on the Endeavour.

After the flag ceremony, Cook's men planted vegetable gardens and later Tobias Furneaux, separated from Cook during the second voyage, re-sown the gardens from HMS Adventure; some of these seeds eventually spread around New Zealand. From the mid-1800s, clearance for gardens and grazing by quarantined angora goats and later sheep steadily stripped the vegetation. All stock were removed in 1925, and the island was finally declared a scenic and historical reserve in 1976, administered by the Department of Conservation. A cairn was unveiled for the 150th anniversary of Cook's claim, a lookout tower was built by local clubs around the 200th, and an interpretation panel was installed for the 250th in consultation with local iwi, reframing the site's story around all the peoples who have travelled to it.

Motuara Island is a small, hilly landmass roughly 59 hectares in size, rising to a summit of about 128 meters above sea level. The terrain rolls steeply from the central ridge down to the water, with regenerating native forest cloaking the slopes and giving way to a rocky shoreline that faces directly onto Cook Strait. The rugged, partly attached rocky islet off the southeastern point, with its cliffs and fortified pā terraces, forms one of the most distinctive landscape features of the reserve.

The summit is the island's most striking vantage point. From the wooden lookout tower, visitors can look back across Queen Charlotte Sound / Tōtaranui toward the surrounding hills of the Marlborough Sounds, and out toward the broad, often wind-driven waters of Cook Strait. The island's dramatic, exposed position at the sound's mouth gives it a far more rugged visual character than the sheltered, beached arms further inside the sounds.

The ecological character of Motuara Island is shaped by regeneration rather than untouched wilderness. After rats were eradicated in 1991, the forest cover that had been progressively stripped through the 1800s and early 1900s began to return, with native bush reclaiming the slopes and gullies. The pest-free status of the reserve is the central fact that defines its natural value: it allows forest regeneration, invertebrate recovery, and the survival of reintroduced birds to proceed without the constant predation pressure that affects the surrounding mainland.

The island functions as a self-contained ecosystem enclave within the Marlborough Sounds. Its regenerating forest offers a refuge for native insects, reptiles and birds, and the combination of rugged terrain, coastal edge, and regenerating canopy creates a layered habitat pattern, from rocky coastal fringe through low forest to higher hilltop vegetation near the lookout. Although small, Motuara is biodiversity-dense by virtue of having the predators removed and the habitat restored.

Birds are the most visible wildlife on Motuara Island, and the reserve is principally managed as a bird sanctuary. Robin, South Island saddleback, grey warbler, New Zealand bellbird, tūī and fantail have all been reintroduced or have recolonised since rats were removed in 1991, and the island now acts as a living example of how quickly low-impact native bird communities can re-establish on a pest-free island in the Marlborough Sounds.

The island also plays a growing role in kiwi conservation. It serves as a temporary crèche for Okarito kiwi chicks as part of the nationwide Operation Nest Egg: at around three months old, chicks are vulnerable to stoats in their native Westland habitat, so they are relocated to Motuara, where they can grow for about a year before being returned to the Ōkārito coastal wetland. In addition to birds and kiwi, the reserve supports native reptiles and a recovering community of native insects associated with the regenerating bush.

Motuara Island's conservation significance is rooted in a small but successful history of pest management and habitat recovery. Stock were removed in 1925, allowing some vegetation recovery; full protection followed when the island was declared a scenic and historical reserve in 1976. The pivotal conservation moment, however, was the eradication of rats in 1991, which transformed the island from a partly grazed remnant into a fully pest-free refuge.

Being pest-free makes Motuara an important node for native species translocation: several bird species were reintroduced or re-established afterwards, and the island now serves as a temporary home for Okarito kiwi chicks vulnerable to stoats in Westland. The reserve is also a working example of how a small island can carry significant biodiversity weight in a coastal region when predators are managed, forest regenerates, and reintroductions are layered on a recovering habitat base.

Before and after Cook's arrival, the entrance to Queen Charlotte Sound was a deeply significant cultural corridor for iwi in the top of the South Island. Rangitāne lived near the island in kāinga, drew on its strategic position for trade in pounamu and pakohe, and built a fortified pā on the islet now known as Hippah Island. Cook's 1770 ceremony was carried out in the presence of the chief Topaa, and encounters at the island were mediated by Tupaia.

The cultural life of the reserve continues to be shaped by these layered histories. The 250th anniversary interpretation panel on the summit was installed in consultation with local iwi and acknowledges all peoples who have travelled to the island. The kiwi chick rehoming project is run in partnership with Te Atiawa alongside Willowbank Wildlife Reserve, the Department of Conservation and E-Ko Tours, embedding current conservation work in on-going relationships between tangata whenua, communities and the reserve.

Motuara Island combines a summit lookout with sweeping views across Queen Charlotte Sound and Cook Strait, the layered monuments of Cook's 1770 claim (the cairn, lookout tower and 250th-anniversary interpretation panel), and a working pest-free bird sanctuary at an unusually accessible location. Its small size, regenerating canopy, and dense concentration of both pre-European and colonial history give it a concentrated richness that few other reserves of comparable size can match.

The reserve can be visited year-round as a day trip from Picton, although calm seas are most common through the warmer months, making access by boat to the Queen Charlotte Sound entrance reliable. Spring and early summer are especially rewarding for bird activity, when reintroduced forest birds are most vocal and the regenerating bush is at its most lush; cooler months can bring clearer, sharper views from the summit across Cook Strait, but conditions on the water can also be more variable.