worms, alpine cicadas, and brightly coloured alpine moths. There are six species of native sandflies (blackfly, Simuliidae) with one endemic to Fiordland. Most of the area falls under the protection of the Fiordland National Park, part of the Te Wahipounamu World Heritage Site. Fiordland National Park has an area of 12,600 square kilometres, making it the largest national park in New Zealand and one of the larger parks in the world, containing many tourist attractions, such as Milford Sound, Doubtful Sound and the Milford Track. The main threat to natural habitats is from introduced species, especially red deer, but these are now being hunted out of the area, and furthermore the park includes a number of small offshore islands which are free from introduced species and are designated Specially Protected Areas. Marine reserves Ten marine reserves have been established in Fiordland to protect a wide variety of species and habitats. The original two reserves were established at the request of New Zealand Federation of Commercial Fishermen in 1993: Piopiotahi (Milford Sound) Marine Reserve Te Awaatu Channel (The Gut) Marine Reserve An additional eight reserves were established on the recommendation of Fiordland Marine Guardians in 2005: Hawea (Clio Rocks) Marine Reserve Kahukura (Gold Arm) Marine Reserve Kutu Parera (Gaer Arm) Marine Reserve Moana Uta (Wet Jacket Arm) Marine Reserve Taipari Roa (Elizabeth Island) Marine Reserve Taumoana (Five Fingers Peninsula) Marine Reserve Te Hapua (Sutherland Sound) Marine Reserve Te Tapuwae o Hua (Long Sound) Marine Reserve Demographics and economy The Fiordland statistical area covers and had an estimated population of as of with a population density of people per km2. Almost the entire population live at Milford Sound (village). Fiordland had a population of 111 at the 2018 New Zealand census, a decrease of 12 people (−9.8%) since the 2013 census, and a decrease of 33 people (−22.9%) since the 2006 census. There were 3 households. There were 54 males and 60 females, giving a sex ratio of 0.9 males per female. The median age was 28.2 years (compared with 37.4 years nationally), with 3 people (2.7%) aged under 15 years, 69 (62.2%) aged 15 to 29, 39 (35.1%) aged 30 to 64, and 3 (2.7%) aged 65 or older. Ethnicities were 73.0% European/Pākehā, 8.1% Māori, 24.3% Asian, and 2.7% other ethnicities (totals add to more than 100% since people could identify with multiple ethnicities). The proportion of people born overseas was