Mercury Islands
The Mercury Islands are a group of seven islands off the northeast coast of New Zealand's North Island. They are located off the coast of the Coromandel Peninsula, and northeast of the town of Whitianga.
History
Great Mercury Island was occupied by both early Māori and Pākehā.A settler claimed to have bought Great Mercury Island in 1839.
Great Mercury, Kawhitu or Stanley Island and Double Island were purchased and taken as crown land in 1858–65. These included Whakakapua and Kowhaka being purchased in January 1865. Despite inhabiting Ahuahu, the Ngati Hei were not consulted about this purchase.
A 2017 settlement recognized the Ngāti Hei as having a legitimate claim to Great Mercury Island.
Description
The main chain of the Mercury Islands consists of the large Great Mercury Island to the west, Red Mercury Island to the east, and five much smaller islands between the two. All the islands, except Ahuahu/Great Mercury Island, have statutory protection and are managed by the Department of Conservation as highly valuable Nature Reserves where public access prohibited. Ahuahu/Great Mercury Island is privately owned and public access is allowed. One lone island, Repanga/Cuvier Island, also a protected Nature Reserve, lies to the north of Ahuahu/Great Mercury Island, although this island is not normally considered part of the Mercury Island group.Approximately 18,000 years ago during the Last Glacial Maximum when sea levels were over 100 metres lower than present day levels, the islands were hilly features surrounded by a vast coastal plain. Sea levels began to rise 7,000 years ago, after which the islands separated from the rest of New Zealand. When sea levels were lower, the Opitonui River flowed east to the Pacific Ocean between Cuvier Island and Ahuahu/Great Mercury Island.
Ahuahu / Great Mercury Island
Ahuahu / Great Mercury Island, 1872 ha, is the largest of Mercury Islands and the only one with permanent residents or public access. It is the remnants of a Pliocene rhyolitic volcano. In pre-colonial times, the island was the location of at least 20 pā, including Matakawau, a pā on the western side of the island where extensive archaeological excavations were undertaken in the 1950s. During the latter 19th century, the island was a location for kauri gum digging.The island is owned by Michael Fay and David Richwhite, two prominent New Zealand businessmen. The private island, which features two luxurious residences, can be hired for around $20,000 NZD per day. U2's lead singer Bono and guitarist The Edge stayed on the island during U2's Vertigo concerts in Auckland in November 2006. On 30 November 2009, Ahuahu/Great Mercury Island hosted the first successful launch of Rocket Lab's suborbital Atea-1 sounding rocket.
In 2014, Fay and Richwhite, in partnership with the Department of Conservation, successfully undertook an eradication program to remove kiore, ship rats and cats from the island. In 2016, it was declared pest free, making the entire Mercury Island Group free from introduced mammalian pests. The island remains open to the public to showcase conservation and provide an accessible pest-free island in the Mercury Island Group.