Lexi Webster
Australia has 8,222 islands within its maritime borders, including the island state of Tasmania, which is the largest island by population with 570,000 residents. Other islands include Raine Island, a vegetated coral cay situated on the outer edges of the Great Barrier Reef, and Kangaroo Island, which is Australia's third-largest island. But how far are these islands from mainland Australia?
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What You'll Learn
Raine Island is 620 km from Cairns, Queensland
Raine Island is a vegetated coral cay situated on the outer edges of the Great Barrier Reef off northeastern Australia. It is located 620 km (390 mi) from Cairns, Queensland, and 120 km (75 mi) from Cape Grenville on the Cape York Peninsula.
Cairns, the city from which the distance to Raine Island is being measured, is a laid-back city in Queensland, Australia, on the tropical northeast coast of Far North Queensland. The region of Cairns is home to the iconic Great Barrier Reef and Wet Tropics World Heritage Rainforest. The city itself is also a popular tourist destination, known for its brilliant cafes, bustling markets, and proximity to beaches. Cairns has a population of approximately 153,181 people, according to the 2021 census, and its economy is primarily based on tourism, healthcare, and education.
Raine Island, on the other hand, is a remote island that is not accessible to the public. It is a highly significant cultural and historical site, falling within the traditional lands and waters of the Wuthathi Aboriginal people. The island is the site of the oldest European structure in tropical Australia, a stone beacon built in 1844. It is also environmentally important, harbouring the world's largest remaining population of green turtles.
The distance of 620 km between Raine Island and Cairns highlights the separation between these two distinct locations in Queensland. While Cairns is a thriving tourist hub, Raine Island is a protected natural habitat that is off-limits to the general public. This distance also underscores the vastness of Queensland and the diversity of its landscapes, from the urban centres to the remote natural reserves.
The significant distance between Raine Island and Cairns is a contributing factor to the island's isolation and preservation. By being located hundreds of kilometres away from a major city like Cairns, Raine Island is better protected from human interference and the potential environmental impacts that come with increased tourism and development. This distance allows Raine Island to remain a sanctuary for the green turtles and other wildlife that call it home.
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It's the largest green turtle nesting area
Raine Island, located in the northern Great Barrier Reef, is the largest and most important green sea turtle nesting area in the world. The island is a vegetated coral cay of 32 hectares (79 acres) and is situated on the outer edges of the Great Barrier Reef off northeastern Australia. It is approximately 620 km (390 mi) north-northwest of Cairns in Queensland and about 120 kilometres (75 mi) east-northeast of Cape Grenville on the Cape York Peninsula.
Raine Island is home to the world's largest remaining population of green turtles (Chelonia mydas). The island has an annual nesting population of tens of thousands of females, with numbers varying from less than 1,000 to more than 10,000. In some seasons, up to 64,000 females nest on the small coral sand cay, and up to 100,000 nesting females have been observed. The cay produces 90% of the region's green turtles, making it an incredibly important site for the conservation of this species.
The nesting site on Raine Island has been active for over 1,000 years, making it the longest-known marine turtle rookery in the world. The site is so important that it is totally protected from public access. The Raine Island Corporation, established under the Meaker Trust (Raine Island Research) Act 1981, was a self-funding statutory authority with the goal of promoting research and ensuring the preservation and protection of the natural and cultural heritage resources of Raine Island and the surrounding areas. While the Act was revoked in 2005 and the Corporation disbanded, Raine Island continues to be monitored and protected by various organisations and the Queensland Government.
Green turtles are among the world's great travellers, with female green turtles migrating more than 2,600 kilometres between feeding grounds and nesting beaches. They are solitary, night-time nesters and usually return to a beach in the general area where they hatched. The life cycle of green turtles involves several stages of development, from hatchling to adult. After emerging from the nest, hatchlings swim to offshore areas, living in pelagic (open ocean) habitats for several years. As juveniles, they leave the open ocean and travel to nearshore foraging grounds in shallow coastal habitats, where they mature into adulthood. Adults migrate every 2 to 5 years from their coastal foraging areas to the waters off the nesting beaches to reproduce.
Green turtles are the largest hard-shelled sea turtles and are unique among sea turtles as they are primarily herbivores, feeding on seagrasses, algae, sponges, and other invertebrates. They play a crucial role in maintaining the health of seagrass communities through grazing and nutrient recycling. However, they face various threats, including marine pollution, vessel strikes, ingestion of marine debris, and the impact of climate change. Their nests are also raided by feral animals, and the lights and disturbances from human activity can disorient hatchlings. Conservation efforts, such as the Turtle Cooling Project, are vital to ensuring the survival of green turtles and protecting their nesting areas like Raine Island.
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The island is protected from public access
Raine Island, a vegetated coral cay situated on the outer edges of the Great Barrier Reef off northeastern Australia, is approximately 620 km (390 mi) north-northwest of Cairns in Queensland. It is named after Captain Thomas Raine, an English mariner who discovered the island. Raine Island is an important environmental icon and is totally protected from public access.
Raine Island is the largest and most important green sea turtle nesting area in the world, with up to 64,000 females nesting on the small coral sand cay in a single season. The island has been a nesting site for over 1,000 years, making it the longest-known marine turtle rookery in the world. The turtle population can vary from less than 1,000 to more than 10,000, and there is a risk of nest inundation due to the changing shape of the island over time.
To protect the turtles and their nesting sites, a collaborative project was undertaken between 2011 and 2020 by the Queensland Government, BHP, the Great Barrier Reef Marine Park Authority, the Great Barrier Reef Foundation, and the Wuthathi and Meriam traditional owners. This project involved reshaping the island using heavy machinery to make it easier for female turtles to navigate and reduce the risk of nest inundation. The project employed sophisticated monitoring and research techniques, including 3D modelling, satellite technology, and drones.
In addition to being a critical habitat for green sea turtles, Raine Island is also historically significant. It is home to the oldest European structure in tropical Australia, a stone beacon built in 1844 using convict labour. The beacon was constructed to aid navigation after more than thirty shipwrecks occurred off the coast of the island, including the HMS Pandora, which was involved in the capture of mutineers from HMS Bounty in 1791.
Due to its environmental and historical significance, Raine Island is protected from public access. This ensures that the island's delicate ecosystem remains undisturbed and that the historical monument is preserved for future generations.
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It's home to the oldest European structure in tropical Australia
Raine Island, situated on the outer edges of the Great Barrier Reef off northeastern Australia, is home to the oldest European structure in tropical Australia. A stone beacon, it was built in 1844. The island was discovered by English mariner Captain Thomas Raine (1793–1860), after whom it is named.
The stone beacon is not the only significant structure on the island. Raine Island is also home to the largest and most important green sea turtle nesting area in the world. Tens of thousands of turtles come to lay their eggs each year, with up to 64,000 females nesting in one season. The island is also an important site for seabird breeding and roosting, supporting over 1% of the world's populations of nesting masked and brown boobies, common and black noddies, as well as regionally significant populations of herald petrels, red-footed boobies and red-tailed tropicbirds.
The Raine Island National Park, which includes Raine Island and the neighbouring Moulter and MacLennan Cays, has been identified by BirdLife International as an Important Bird Area. The island falls within the traditional lands and waters of the Wuthathi Aboriginal people, who share their interests in the area with Torres Strait Islander peoples.
The waters around Raine Island were treacherous for early European navigators, with more than thirty shipwrecks off its coast, including that of the HMS Pandora. The island was mined for guano in the 1890s. Today, Raine Island is totally protected from public access, with the seabirds and turtles breeding colonies afforded the state's highest possible level of legal protection, strictly limiting all access to scientific research and essential management.
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Tasmania is the largest island off the mainland
Raine Island, a vegetated coral cay situated on the outer edges of the Great Barrier Reef off northeastern Australia, is approximately 620 km (390 mi) north-northwest of Cairns in Queensland. It is known for being the site of the oldest European structure in tropical Australia, a stone beacon built in 1844, and for harbouring the world's largest remaining population of green turtles.
Now, to address the statement, "Tasmania is the largest island off the mainland." Tasmania is indeed the largest island off the coast of mainland Australia, with a land area of 64,519 square kilometres (24,911 sq mi). It is located off the southeast coast of mainland Australia and is separated from the mainland by Bass Strait, which is approximately 250 km (160 mi) wide and 500 km (310 mi) long. The strait was formed around 8,000 years ago due to rising sea levels at the end of the last glacial period.
Tasmania is followed by Melville Island in the Northern Territory, with a land area of 5,786 square kilometres (2,234 sq mi), and Kangaroo Island in South Australia, with an area of 4,416 square kilometres (1,705 sq mi). These islands, along with thousands of others, surround the Australian mainland.
The separation of Tasmania from the Australian mainland has resulted in distinct geographical and ecological characteristics. For instance, Tasmania experiences a cooler and more temperate climate compared to the mainland, influencing its flora and fauna. The island is known for its diverse landscapes, including rugged mountains, lush rainforests, and pristine beaches.
Additionally, Tasmania has a unique cultural and historical heritage. It has a significant indigenous history and was also a site of early European exploration and settlement. The separation from the mainland has fostered a distinct sense of identity and pride among Tasmanians, with a strong emphasis on their island state's natural beauty and environmental conservation.
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Frequently asked questions
Raine Island is approximately 620 km (390 mi) north-northwest of Cairns in Queensland, Australia.
No, Raine Island is totally protected from public access.
Tasmania is the largest island near mainland Australia.
The closest point between Kangaroo Island and mainland Australia is Snapper Point in Backstairs Passage, which is 13.5 km (8.4 mi) from the Fleurieu Peninsula.
Bass Strait is approximately 250 km (160 mi) wide and 500 km (310 mi) long.
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