The Commonwealth of Australia is a country in the southern hemisphere comprising the mainland of the world's smallest continent, the major island of Tasmania, and a number of other islands in the Indian and Pacific Oceans.N4 The neighbouring countries are Indonesia, East Timor, and Papua New Guinea to the north, the Solomon Islands, Vanuatu, and New Caledonia to the north-east, and New Zealand to the south-east.
The Australian mainland has been inhabited for more than 42,000 years by Indigenous Australians. After sporadic visits by fishermen from the north and then European discovery by Dutch explorers in 1606, the eastern half of Australia was later claimed by the British in 1770 and initially settled through penal transportation as part of the colony of New South Wales, commencing on 26 January 1788. As the population grew and new areas were explored, another five largely self-governing Crown Colonies were established during the 19th century.
On 1 January 1901, the six colonies became a federation, and the Commonwealth of Australia was formed. Since federation, Australia has maintained a stable liberal democratic political system and remains a Commonwealth realm. The capital city is Canberra, located in the Australian Capital Territory (ACT). The population is just over 21 million, with approximately 60% of the population concentrated in and around the mainland state capitals of Sydney, Melbourne, Brisbane, Perth, and Adelaide.
Sunday, 10 February 2008
Etymology
The name "Australia" is derived from the Latin Australis, meaning "Southern". Legends of an "unknown land of the south" (terra australis incognita) date back to Roman times and were commonplace in medieval geography, but were not based on any actual knowledge of the continent. The first use of the word "Australia" in English was in 1625—the words "A note of Australia del Espiritu Santo, written by Master Hakluyt", published by Samuel Purchas in Hakluytus Posthumus. The Dutch adjectival form Australische was used by Dutch officials in Batavia to refer to the newly discovered land to the south in 1638. "Australia" was used in a 1693 translation of Les Aventures de Jacques Sadeur dans la Découverte et le Voyage de la Terre Australe, a 1692 French novel by Gabriel de Foigny under the pen name Jacques Sadeur. Alexander Dalrymple then used it in An Historical Collection of Voyages and Discoveries in the South Pacific Ocean (1771), to refer to the entire South Pacific region. In 1793, George Shaw and Sir James Smith published Zoology and Botany of New Holland, in which they wrote of "the vast island, or rather continent, of Australia, Australasia or New Holland."
The name "Australia" was popularised by the 1814 work A Voyage to Terra Australis by the navigator Matthew Flinders, the first recorded person to circumnavigate Australia. Though its title reflected the British Admiralty's usage, Flinders used the word "Australia" in his book, and as it was widely read it gave the term general currency. Governor Lachlan Macquarie of New South Wales subsequently used the word in his dispatches to England, and on 12 December 1817 recommended to the Colonial Office that it be officially adopted. In 1824, the Admiralty agreed that the continent should be known officially as "Australia".
The word "Australia" in Australian English is pronounced /əˈstɹæɪljə, -liːə, -jə/.
The name "Australia" was popularised by the 1814 work A Voyage to Terra Australis by the navigator Matthew Flinders, the first recorded person to circumnavigate Australia. Though its title reflected the British Admiralty's usage, Flinders used the word "Australia" in his book, and as it was widely read it gave the term general currency. Governor Lachlan Macquarie of New South Wales subsequently used the word in his dispatches to England, and on 12 December 1817 recommended to the Colonial Office that it be officially adopted. In 1824, the Admiralty agreed that the continent should be known officially as "Australia".
The word "Australia" in Australian English is pronounced /əˈstɹæɪljə, -liːə, -jə/.
History
The first human habitation of Australia is estimated to have occurred between 42,000 and 48,000 years ago. These first Australians were possibly the ancestors of the current Indigenous Australians; they may have arrived via land bridges and short sea-crossings from present-day South-East Asia. Most of these people were hunter-gatherers, with a complex oral culture and spiritual values based on reverence for the land and a belief in the Dreamtime. The Torres Strait Islanders, ethnically Melanesian, inhabited the Torres Strait Islands and parts of far-north Queensland; their cultural practices were and remain distinct from those of the Aborigines.
The first recorded European sighting of the Australian mainland was made by the Dutch navigator Willem Janszoon, who sighted the coast of Cape York Peninsula in 1606. During the 17th century, the Dutch charted the whole of the western and northern coastlines of what they called New Holland, but made no attempt at settlement. In 1770, James Cook sailed along and mapped the east coast of Australia, which he named New South Wales and claimed for Great Britain. The expedition's discoveries provided impetus for the establishment of a penal colony there.
The British Crown Colony of New South Wales started with the establishment of a settlement at Port Jackson by Captain Arthur Phillip on 26 January 1788. This date was later to become Australia's national day, Australia Day. Van Diemen's Land, now known as Tasmania, was settled in 1803 and became a separate colony in 1825. The United Kingdom formally claimed the western part of Australia in 1829. Separate colonies were created from parts of New South Wales: South Australia in 1836, Victoria in 1851, and Queensland in 1859. The Northern Territory (NT) was founded in 1911 when it was excised from South Australia. South Australia was founded as a "free province"—that is, it was never a penal colony. Victoria and Western Australia were also founded "free", but later accepted transported convicts. The transportation of convicts to the colony of New South Wales ceased in 1848 after a campaign by the settlers.
The Indigenous Australian population, estimated at 350,000 at the time of European settlement, declined steeply for 150 years following settlement, mainly because of infectious disease combined with forced re-settlement and cultural disintegration. The removal of children from their families, which some historians and Indigenous Australians have argued could be considered to constitute genocide by some definitions, may have contributed to the decline in the indigenous population. Such interpretations of Aboriginal history are disputed by some commentators as being exaggerated or fabricated for political or ideological reasons. This debate is known within Australia as the History Wars. Following the 1967 referendum, the Federal government gained the power to implement policies and make laws with respect to Aborigines. Traditional ownership of land—native title—was not recognised until 1992, when the High Court case Mabo v Queensland (No 2) overturned the notion of Australia as terra nullius ("empty land") at the time of European occupation.
A gold rush began in Australia in the early 1850s, and the Eureka Stockade rebellion against mining licence fees in 1854 was an early expression of civil disobedience. Between 1855 and 1890, the six colonies individually gained responsible government, managing most of their own affairs while remaining part of the British Empire. The Colonial Office in London retained control of some matters, notably foreign affairs, defence, and international shipping. On 1 January 1901, federation of the colonies was achieved after a decade of planning, consultation, and voting, and the Commonwealth of Australia was born as a Dominion of the British Empire. The Federal Capital Territory (later renamed the Australian Capital Territory) was formed from a part of New South Wales in 1911 to provide a location for the proposed new federal capital of Canberra (Melbourne was the temporary seat of government from 1901 to 1927 while Canberra was being constructed). The Northern Territory was transferred from the control of the South Australian government to the Commonwealth in 1911. Australia willingly participated in World War I. Many Australians regard the defeat of the Australian and New Zealand Army Corps (ANZACs) at Gallipoli as the birth of the nation—its first major military action. The Kokoda Track Campaign is regarded by many as an analogous nation-defining event during World War II.
The Statute of Westminster 1931 formally ended most of the constitutional links between Australia and the United Kingdom when Australia adopted it in 1942. The shock of the United Kingdom's defeat in Asia in 1942 and the threat of Japanese invasion caused Australia to turn to the United States as a new ally and protector. Since 1951, Australia has been a formal military ally of the US under the auspices of the ANZUS treaty. After World War II, Australia encouraged immigration from Europe; since the 1970s and the abolition of the White Australia policy, immigration from Asia and other non-European parts of the world was also encouraged. As a result, Australia's demography, culture, and self-image have been radically transformed. The final constitutional ties between Australia and the UK were severed in 1986 with the passing of the Australia Act 1986, ending any British role in the government of the Australian States, and ending judicial appeals to the UK Privy Council. In 1999, Australian voters rejected by a majority of less than 5% a move to become a republic with a president appointed by Parliament. Since the election of the Whitlam Government in 1972, there has been an increasing focus on the expansion of ties with other Pacific Rim nations.
The first recorded European sighting of the Australian mainland was made by the Dutch navigator Willem Janszoon, who sighted the coast of Cape York Peninsula in 1606. During the 17th century, the Dutch charted the whole of the western and northern coastlines of what they called New Holland, but made no attempt at settlement. In 1770, James Cook sailed along and mapped the east coast of Australia, which he named New South Wales and claimed for Great Britain. The expedition's discoveries provided impetus for the establishment of a penal colony there.
The British Crown Colony of New South Wales started with the establishment of a settlement at Port Jackson by Captain Arthur Phillip on 26 January 1788. This date was later to become Australia's national day, Australia Day. Van Diemen's Land, now known as Tasmania, was settled in 1803 and became a separate colony in 1825. The United Kingdom formally claimed the western part of Australia in 1829. Separate colonies were created from parts of New South Wales: South Australia in 1836, Victoria in 1851, and Queensland in 1859. The Northern Territory (NT) was founded in 1911 when it was excised from South Australia. South Australia was founded as a "free province"—that is, it was never a penal colony. Victoria and Western Australia were also founded "free", but later accepted transported convicts. The transportation of convicts to the colony of New South Wales ceased in 1848 after a campaign by the settlers.
The Indigenous Australian population, estimated at 350,000 at the time of European settlement, declined steeply for 150 years following settlement, mainly because of infectious disease combined with forced re-settlement and cultural disintegration. The removal of children from their families, which some historians and Indigenous Australians have argued could be considered to constitute genocide by some definitions, may have contributed to the decline in the indigenous population. Such interpretations of Aboriginal history are disputed by some commentators as being exaggerated or fabricated for political or ideological reasons. This debate is known within Australia as the History Wars. Following the 1967 referendum, the Federal government gained the power to implement policies and make laws with respect to Aborigines. Traditional ownership of land—native title—was not recognised until 1992, when the High Court case Mabo v Queensland (No 2) overturned the notion of Australia as terra nullius ("empty land") at the time of European occupation.
A gold rush began in Australia in the early 1850s, and the Eureka Stockade rebellion against mining licence fees in 1854 was an early expression of civil disobedience. Between 1855 and 1890, the six colonies individually gained responsible government, managing most of their own affairs while remaining part of the British Empire. The Colonial Office in London retained control of some matters, notably foreign affairs, defence, and international shipping. On 1 January 1901, federation of the colonies was achieved after a decade of planning, consultation, and voting, and the Commonwealth of Australia was born as a Dominion of the British Empire. The Federal Capital Territory (later renamed the Australian Capital Territory) was formed from a part of New South Wales in 1911 to provide a location for the proposed new federal capital of Canberra (Melbourne was the temporary seat of government from 1901 to 1927 while Canberra was being constructed). The Northern Territory was transferred from the control of the South Australian government to the Commonwealth in 1911. Australia willingly participated in World War I. Many Australians regard the defeat of the Australian and New Zealand Army Corps (ANZACs) at Gallipoli as the birth of the nation—its first major military action. The Kokoda Track Campaign is regarded by many as an analogous nation-defining event during World War II.
The Statute of Westminster 1931 formally ended most of the constitutional links between Australia and the United Kingdom when Australia adopted it in 1942. The shock of the United Kingdom's defeat in Asia in 1942 and the threat of Japanese invasion caused Australia to turn to the United States as a new ally and protector. Since 1951, Australia has been a formal military ally of the US under the auspices of the ANZUS treaty. After World War II, Australia encouraged immigration from Europe; since the 1970s and the abolition of the White Australia policy, immigration from Asia and other non-European parts of the world was also encouraged. As a result, Australia's demography, culture, and self-image have been radically transformed. The final constitutional ties between Australia and the UK were severed in 1986 with the passing of the Australia Act 1986, ending any British role in the government of the Australian States, and ending judicial appeals to the UK Privy Council. In 1999, Australian voters rejected by a majority of less than 5% a move to become a republic with a president appointed by Parliament. Since the election of the Whitlam Government in 1972, there has been an increasing focus on the expansion of ties with other Pacific Rim nations.
Politics
The Commonwealth of Australia is a constitutional democracy based on a federal division of powers. The form of government used in Australia is a constitutional monarchy with a parliamentary system of government. Queen Elizabeth II is the Queen of Australia, a role that is distinct from her position as monarch of the other Commonwealth realms. The Queen is represented by the Governor-General at federal level and by the Governors at state level. Although the Constitution gives extensive executive powers to the Governor-General, these are normally exercised only on the advice of the Prime Minister. The most notable exercise of the Governor-General's reserve powers outside the Prime Minister's direction was the dismissal of the Whitlam Government in the constitutional crisis of 1975.
There are three branches of government:
The legislature: the Commonwealth Parliament, comprising the Queen, the Senate, and the House of Representatives; the Queen is represented by the Governor-General, who by convention acts on the advice of his Ministers.
The executive: the Federal Executive Council (the Governor-General as advised by the Executive Councillors); in practice, the councillors are the Prime Minister and Ministers of State.
The judiciary: the High Court of Australia and other federal courts. Appeals from Australian courts to the Judicial Committee of the Privy Council in the United Kingdom ceased when the Australia Act was passed in 1986.
The bicameral Commonwealth Parliament consists of the Queen, the Senate (the upper house) of 76 senators, and a House of Representatives (the lower house) of 150 members. Members of the lower house are elected from single-member constituencies, commonly known as "electorates" or "seats". Seats in the House of Representatives are allocated to states on the basis of population, with each original state guaranteed a minimum of five seats. In the Senate, each state is represented by 12 senators, and each of the territories (the ACT and the NT) by two. Elections for both chambers are held every three years; senators have overlapping six-year terms, and only half of the seats are put to each election unless the cycle is interrupted by a double dissolution. The party with majority support in the House of Representatives forms government, and its leader becomes Prime Minister.
There are two major political groups that form government: the Australian Labor Party, and the Coalition which is a grouping of two parties: the Liberal Party, and its minor partner, the National Party. Independent members and several minor parties—including the Greens and the Australian Democrats—have achieved representation in Australian parliaments, mostly in upper houses. Since 3 December 2007, shortly after the 2007 election, the Labor Party led by the Prime Minister Kevin Rudd has been in power in Canberra, and the party is now in power in every parliament in the country. In the 2004 election, the previous governing Coalition led by John Howard won control of the Senate—the first time in more than 20 years that a party (or a coalition) has done so while in government. Voting is compulsory for all enrolled citizens 18 years and over, in each state and territory and at the federal level. Enrolment to vote is compulsory in all jurisdictions except South Australia.
There are three branches of government:
The legislature: the Commonwealth Parliament, comprising the Queen, the Senate, and the House of Representatives; the Queen is represented by the Governor-General, who by convention acts on the advice of his Ministers.
The executive: the Federal Executive Council (the Governor-General as advised by the Executive Councillors); in practice, the councillors are the Prime Minister and Ministers of State.
The judiciary: the High Court of Australia and other federal courts. Appeals from Australian courts to the Judicial Committee of the Privy Council in the United Kingdom ceased when the Australia Act was passed in 1986.
The bicameral Commonwealth Parliament consists of the Queen, the Senate (the upper house) of 76 senators, and a House of Representatives (the lower house) of 150 members. Members of the lower house are elected from single-member constituencies, commonly known as "electorates" or "seats". Seats in the House of Representatives are allocated to states on the basis of population, with each original state guaranteed a minimum of five seats. In the Senate, each state is represented by 12 senators, and each of the territories (the ACT and the NT) by two. Elections for both chambers are held every three years; senators have overlapping six-year terms, and only half of the seats are put to each election unless the cycle is interrupted by a double dissolution. The party with majority support in the House of Representatives forms government, and its leader becomes Prime Minister.
There are two major political groups that form government: the Australian Labor Party, and the Coalition which is a grouping of two parties: the Liberal Party, and its minor partner, the National Party. Independent members and several minor parties—including the Greens and the Australian Democrats—have achieved representation in Australian parliaments, mostly in upper houses. Since 3 December 2007, shortly after the 2007 election, the Labor Party led by the Prime Minister Kevin Rudd has been in power in Canberra, and the party is now in power in every parliament in the country. In the 2004 election, the previous governing Coalition led by John Howard won control of the Senate—the first time in more than 20 years that a party (or a coalition) has done so while in government. Voting is compulsory for all enrolled citizens 18 years and over, in each state and territory and at the federal level. Enrolment to vote is compulsory in all jurisdictions except South Australia.
States and territories
Australia has six states, two major mainland territories, and other minor territories. The states are New South Wales, Queensland, South Australia, Tasmania, Victoria, and Western Australia. The two major mainland territories are the Northern Territory and the Australian Capital Territory. In most respects, the territories function like the states, but the Commonwealth Parliament can override any legislation of their parliaments. By contrast, federal legislation only overrides state legislation in certain areas that are set out in Section 51 of the Constitution; State parliaments retain all residual legislative powers, including powers over hospitals, education, police, the judiciary, roads, public transport, and local government.
Each state and territory has its own legislature: unicameral in the Northern Territory, the ACT, and Queensland, and bicameral in the remaining states. The lower house is known as the Legislative Assembly (House of Assembly in South Australia and Tasmania) and the upper house is known as the Legislative Council. The head of the government in each state is the premier, and in each territory the chief minister. The Queen is represented in each state by a governor; an administrator in the Northern Territory, and the Australian Governor-General in the ACT, have analogous roles.
Australia also has several minor territories; the federal government administers a separate area within New South Wales, the Jervis Bay Territory, as a naval base and sea port for the national capital. In addition Australia has the following, inhabited, external territories: Norfolk Island, Christmas Island, Cocos (Keeling) Islands, and several largely uninhabited external territories: Ashmore and Cartier Islands, Coral Sea Islands, Heard Island and McDonald Islands, and the Australian Antarctic Territory.
Each state and territory has its own legislature: unicameral in the Northern Territory, the ACT, and Queensland, and bicameral in the remaining states. The lower house is known as the Legislative Assembly (House of Assembly in South Australia and Tasmania) and the upper house is known as the Legislative Council. The head of the government in each state is the premier, and in each territory the chief minister. The Queen is represented in each state by a governor; an administrator in the Northern Territory, and the Australian Governor-General in the ACT, have analogous roles.
Australia also has several minor territories; the federal government administers a separate area within New South Wales, the Jervis Bay Territory, as a naval base and sea port for the national capital. In addition Australia has the following, inhabited, external territories: Norfolk Island, Christmas Island, Cocos (Keeling) Islands, and several largely uninhabited external territories: Ashmore and Cartier Islands, Coral Sea Islands, Heard Island and McDonald Islands, and the Australian Antarctic Territory.
Foreign relations and the military
Over recent decades, Australia's foreign relations have been driven by a close association with the United States through the ANZUS pact, and by a desire to develop relationships with Asia and the Pacific, particularly through ASEAN and the Pacific Islands Forum. In 2005 Australia secured an inaugural seat at the East Asia Summit following its accession to the Treaty of Amity and Cooperation. Australia is a member of the Commonwealth of Nations, in which the Commonwealth Heads of Government meetings provide the main forum for co-operation. Australia has energetically pursued the cause of international trade liberalisation. Australia led the formation of the Cairns Group and APEC, and is a member of the OECD and the WTO. Australia has pursued several major bilateral free trade agreements, most recently the Australia-United States Free Trade Agreement and Closer Economic Relations with New Zealand. Australia is a founding member of the United Nations, and maintains an international aid program under which some 60 countries receive assistance. The 2005–06 budget provides A$2.5 bn for development assistance; as a percentage of GDP, this contribution is less than that of the UN Millennium Development Goals.
Australia's armed forces—the Australian Defence Force (ADF)—comprise the Royal Australian Navy (RAN) , the Australian Army, and the Royal Australian Air Force (RAAF), numbering about 51,000. All branches of the ADF have been involved in UN and regional peacekeeping (most recently in East Timor, the Solomon Islands and Sudan), disaster relief, and armed conflict, including the 2003 invasion of Iraq. The government appoints the Chief of the Defence Force from one of the armed services; the current Chief of the Defence Force is Air Chief Marshal Angus Houston. In the 2006–07 budget, defence spending is A$22 bn.
Australia's armed forces—the Australian Defence Force (ADF)—comprise the Royal Australian Navy (RAN) , the Australian Army, and the Royal Australian Air Force (RAAF), numbering about 51,000. All branches of the ADF have been involved in UN and regional peacekeeping (most recently in East Timor, the Solomon Islands and Sudan), disaster relief, and armed conflict, including the 2003 invasion of Iraq. The government appoints the Chief of the Defence Force from one of the armed services; the current Chief of the Defence Force is Air Chief Marshal Angus Houston. In the 2006–07 budget, defence spending is A$22 bn.
Geography and environment
Australia's 7,617,930 square kilometres (2,941,299 sq. mi) landmass is on the Indo-Australian Plate. Surrounded by the IndianN4 and Pacific oceans, Australia is separated from Asia by the Arafura and Timor seas. Australia has 34,218 kilometres (21,262 mi) of coastline (excluding all offshore islands) and claims an extensive exclusive economic zone of 8,148,250 square kilometres (3,146,057 sq. mi). This exclusive economic zone does not include the Australian Antarctic Territory.
The Great Barrier Reef, the world's largest coral reef, lies a short distance off the north-east coast and extends for over 2,000 kilometres (1,250 mi). Mount Augustus, claimed to be the world's largest monolith, is located in Western Australia. At 2,228 metres (7,310 ft), Mount Kosciuszko on the Great Dividing Range is the highest mountain on the Australian mainland, although Mawson Peak on the remote Australian territory of Heard Island is taller at 2,745 metres (9,006 ft).
By far the largest part of Australia is desert or semi-arid. Australia is the flattest continent, with the oldest and least fertile soils, and is the driest inhabited continent. Only the south-east and south-west corners of the continent have a temperate climate. Most of the population lives along the temperate south-eastern coastline. The landscapes of the northern part of the country, with a tropical climate, consist of rainforest, woodland, grassland, mangrove swamps, and desert. The climate is significantly influenced by ocean currents, including the El Niño southern oscillation, which is correlated with periodic drought, and the seasonal tropical low pressure system that produces cyclones in northern Australia.
Although most of Australia is semi-arid or desert, it includes a diverse range of habitats, from alpine heaths to tropical rainforests, and is recognised as a megadiverse country. Because of the continent's great age (and consequent low levels of fertility), its extremely variable weather patterns, and its long-term geographic isolation, much of Australia's biota is unique and diverse. About 85% of flowering plants, 84% of mammals, more than 45% of birds, and 89% of in-shore, temperate-zone fish are endemic. Many of Australia's ecoregions, and the species within those regions, are threatened by human activities and introduced plant and animal species. The federal Environment Protection and Biodiversity Conservation Act 1999 is a legal framework for the protection of threatened species. Numerous protected areas have been created under the national Biodiversity Action Plan to protect and preserve unique ecosystems; 64 wetlands are registered under the Ramsar Convention, and 16 World Heritage Sites have been established. Australia was ranked 13th in the world on the 2005 Environmental Sustainability Index.
Most Australian woody plant species are evergreen and many are adapted to fire and drought, including many eucalypts and acacias. Australia has a rich variety of endemic legume species that thrive in nutrient-poor soils because of their symbiosis with Rhizobia bacteria and mycorrhizal fungi. Among well-known Australian fauna are the monotremes (the platypus and the echidna); a host of marsupials, including the kangaroo, the koala, and the wombat; the saltwater and freshwater crocodiles; and birds such as the emu and the kookaburra. Australia is home to the largest number of venomous snakes in the world. The dingo was introduced by Austronesian people who traded with Indigenous Australians around 3000 BCE. Many plant and animal species became extinct soon after first human settlement, including the Australian megafauna; others have become extinct since European settlement, among them the Thylacine.
The Great Barrier Reef, the world's largest coral reef, lies a short distance off the north-east coast and extends for over 2,000 kilometres (1,250 mi). Mount Augustus, claimed to be the world's largest monolith, is located in Western Australia. At 2,228 metres (7,310 ft), Mount Kosciuszko on the Great Dividing Range is the highest mountain on the Australian mainland, although Mawson Peak on the remote Australian territory of Heard Island is taller at 2,745 metres (9,006 ft).
By far the largest part of Australia is desert or semi-arid. Australia is the flattest continent, with the oldest and least fertile soils, and is the driest inhabited continent. Only the south-east and south-west corners of the continent have a temperate climate. Most of the population lives along the temperate south-eastern coastline. The landscapes of the northern part of the country, with a tropical climate, consist of rainforest, woodland, grassland, mangrove swamps, and desert. The climate is significantly influenced by ocean currents, including the El Niño southern oscillation, which is correlated with periodic drought, and the seasonal tropical low pressure system that produces cyclones in northern Australia.
Although most of Australia is semi-arid or desert, it includes a diverse range of habitats, from alpine heaths to tropical rainforests, and is recognised as a megadiverse country. Because of the continent's great age (and consequent low levels of fertility), its extremely variable weather patterns, and its long-term geographic isolation, much of Australia's biota is unique and diverse. About 85% of flowering plants, 84% of mammals, more than 45% of birds, and 89% of in-shore, temperate-zone fish are endemic. Many of Australia's ecoregions, and the species within those regions, are threatened by human activities and introduced plant and animal species. The federal Environment Protection and Biodiversity Conservation Act 1999 is a legal framework for the protection of threatened species. Numerous protected areas have been created under the national Biodiversity Action Plan to protect and preserve unique ecosystems; 64 wetlands are registered under the Ramsar Convention, and 16 World Heritage Sites have been established. Australia was ranked 13th in the world on the 2005 Environmental Sustainability Index.
Most Australian woody plant species are evergreen and many are adapted to fire and drought, including many eucalypts and acacias. Australia has a rich variety of endemic legume species that thrive in nutrient-poor soils because of their symbiosis with Rhizobia bacteria and mycorrhizal fungi. Among well-known Australian fauna are the monotremes (the platypus and the echidna); a host of marsupials, including the kangaroo, the koala, and the wombat; the saltwater and freshwater crocodiles; and birds such as the emu and the kookaburra. Australia is home to the largest number of venomous snakes in the world. The dingo was introduced by Austronesian people who traded with Indigenous Australians around 3000 BCE. Many plant and animal species became extinct soon after first human settlement, including the Australian megafauna; others have become extinct since European settlement, among them the Thylacine.
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