Ruqayyah Snyder
Australia is a nation of high biodiversity, with a large variety of animals that are unique to the continent. In fact, 87% of its mammal species, 93% of reptiles, 94% of frogs and 45% of bird species are found only in Australia. The country's long geographic isolation, tectonic stability, and unique climate change patterns have contributed to this high level of endemism. Australia's fauna includes well-known animals like kangaroos, koalas, dingos, wallabies, wombats, and the Tasmanian devil, as well as a diverse range of birds, reptiles, amphibians, and invertebrates. The country is also home to two of the world's five known monotremes: the platypus and the short-beaked echidna.
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What You'll Learn
Australia's unique biodiversity
Australia is a land of unique biodiversity, with many species found nowhere else on Earth. This is due to the continent's long geographic isolation, tectonic stability, and unique patterns of climate change over time. Australia is one of only 17 'megadiverse' nations, with more species than any other developed country.
The fauna of Australia is incredibly diverse, with high levels of endemism. This includes 46% of birds, 69% of mammals, 94% of amphibians, and 93% of reptiles that inhabit the continent being endemic. Australia is home to two of the world's five known monotremes (egg-laying mammals): the platypus and the short-beaked echidna. The platypus is a venomous, egg-laying, duck-billed amphibious mammal, while the echidna has porcupine-like spines, a bird-like beak, and lays eggs like a reptile. Other unique Australian animals include the kangaroo, koala, wombat, dingo, wallaby, and the Tasmanian devil. The Tasmanian devil is an endangered marsupial, carrying up to four young in its pouch, and is found only in Tasmania, where it plays a crucial role in pest control of introduced species.
Australia's marine life is also diverse, with many species of tropical fish, corals, turtles, and even sharks. The Port Jackson shark, zebra bullhead shark, and crested bullhead shark are all native to Australian waters. The country's vast coastline also attracts migrating whales, with humpback and southern right whales travelling along the coasts between May and November.
Invertebrates make up a significant portion of Australia's biodiversity, with 96% of insects and molluscs being endemic. Beetles and weevils are the most diverse insect orders, followed by butterflies and moths, ants, bees, and wasps. Introduced species, such as the European wasp and red fire ant, pose a significant threat to native species.
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Native and exotic animals
Australia is a nation of significant biodiversity, with a vast array of native and exotic animals. The continent has a high level of endemism, meaning many of its animals are found nowhere else in the world. This is due to the continent's long geographic isolation, tectonic stability, and unique climate change patterns over time. Australia is home to a wide range of unique mammals, birds, amphibians, and reptiles, with many iconic species that have become synonymous with the country itself.
Native Animals
Native Australian animals include the kangaroo, koala, dingo, wallaby, wombat, platypus, and echidna. The kangaroo is Australia's largest marsupial and an iconic symbol of the country, with about 50 million kangaroos in the country, more than the human population. There are around 55 different species of kangaroos, ranging from large red kangaroos to tiny musky rat-kangaroos. Koalas, another well-known Australian animal, live in eucalypt forests along the eastern coastline. These tree-dwelling marsupials are known for their lazy nature, sleeping up to 20 hours a day and eating large amounts of eucalyptus leaves. Dingos, Australia's largest carnivorous mammals, can be found across the country except for Tasmania. They resemble domestic dogs but have longer muzzles, larger pointed ears, and sharper teeth.
Other native animals include the wombat, a burrowing marsupial that can weigh up to 36 kg, the platypus, a monotreme or egg-laying mammal known for its unique appearance with a duck-like bill and beaver-like tail, and the echidna, another monotreme with porcupine-like spines and a bird-like beak. The Tasmanian devil, a feisty carnivorous marsupial with powerful jaws, is native to the island of Tasmania, where it plays a crucial role in controlling introduced animal species. Australia is also home to a diverse range of birds, including the laughing kookaburra, known for its distinctive call that resembles human laughter, the emu, the tallest bird in Australia, and the cassowary, the heaviest flightless bird in the country.
Exotic Animals
While Australia is known for its unique native fauna, there are also exotic animal species that have been introduced or migrated to the country. Australia's vast coastline attracts humpback and southern right whales, with annual migrations along the coasts between May and November. The country's aquamarine life includes various shark species, such as the Port Jackson shark, zebra bullhead shark, and crested bullhead shark. Introduced species, such as the European wasp, red fire ant, and feral honeybees, can pose significant threats to native Australian animals.
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Marsupials and monotremes
Marsupials
Marsupials are mammals that nourish their young in pouches. The koala, for instance, carries its baby, known as a joey, in its mother's pouch for the first six months of its life. The Tasmanian devil is another example of a marsupial native to Australia. It carries up to four young in its pouch for up to four months. The Tasmanian devil is the largest carnivorous marsupial and has powerful jaws and teeth. It is also an endangered species, now found only in Tasmania.
Monotremes
Monotremes are an anomaly within the animal kingdom, as they are mammals that lay eggs and have no teats. The platypus and the echidna are the two monotremes found in Australia. The platypus has a bill like a duck, a tail like a beaver, and webbed feet. It can grow up to 60 cm in length and is a very shy animal. The echidna has porcupine-like spines, a bird-like beak, a pouch, and lays eggs. It feeds its young with milk that oozes out of the skin in its pouch. The short-beaked echidna is the only monotreme found across the entire Australian continent.
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Introduced animals
Australia's unique fauna has been significantly affected by the introduction of non-native species. The country is home to a large variety of animals, with 46% of its birds, 69% of mammals, 94% of amphibians, and 93% of reptiles endemic to the continent. However, the introduction of non-native species has had a detrimental impact on Australia's native wildlife.
One of the most well-known introduced animals in Australia is the European wasp. This invasive species poses a significant threat to native insects and ecosystems. Other introduced insects that have negatively impacted Australia's environment include the red fire ant, the yellow crazy ant, and feral honeybees. These ants are aggressive and have been known to attack native animals and compete with them for resources.
Feral cats and foxes are another example of introduced animals that have caused harm to Australia's native wildlife. These predators have contributed to the decline of native animal populations, especially in Tasmania, where the Tasmanian devil, a native marsupial, plays a crucial role in controlling their numbers. The Tasmanian devil is an important natural pest controller, and its presence helps protect native wildlife from the negative impacts of these introduced species.
In addition to the aforementioned species, other introduced animals in Australia include various shark species, such as the bull shark, tiger shark, and great white shark, which pose a significant threat to humans and marine life. The overfishing of sharks has also reduced their numbers, and several species are now endangered.
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Endangered species
Australia is home to some of the world's most beautiful nature and iconic wildlife found only within its borders. More than 80% of its plants, mammals, reptiles, and frogs are unique to the continent. However, Australia has the highest mammal extinction rate in the world, and over 570 of its native animals are at risk of being lost forever.
The Tasmanian devil, for instance, was once found throughout mainland Australia but is now only encountered in the wild on the island of Tasmania. It is listed as endangered by the IUCN Red List, with a population decline of more than 60% in the last 10 years, mainly due to a contagious facial tumour disease. The Tasmanian devil is the largest living carnivorous marsupial, despite being only the size of a small dog.
The northern hairy-nosed wombat is another critically endangered species, with only 315 individuals living in two small, protected areas of Queensland. They are even scarcer than the giant panda and the Sumatran tiger. The wombat species as a whole is threatened by a disease called mange, agricultural activities, vehicles, droughts, floods, and fires.
The mountain pygmy-possum is another tiny possum species that is endangered. These possums, not much bigger than mice, are only found in alpine and sub-alpine regions of southern Victoria and around Mount Kosciusko in New South Wales. They spend up to seven months of the year hibernating under the snow and emerge in early spring to mate.
The orange-bellied parrot is also among Australia's most threatened species, with only up to 50 adults remaining in the wild. They are a small, migratory ground-dwelling parrot that migrates from Tasmania to coastal Victoria and South Australia for the autumn and winter.
Other endangered species in Australia include the koala, the long-nosed potoroo, the mainland spectacled hare-wallaby, the swift parrot, and the western ringtail possum.
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Frequently asked questions
Australia has some of the most unique biodiversity on the planet. Some of the well-known unique animals in Australia include koalas, kangaroos, dingos, wallabies, wombats, platypuses, and echidnas.
The Tasmanian devil is an endangered species that can only be found on the island of Tasmania. It is the world's largest carnivorous marsupial and is known for its blood-curdling screams, eerie growls, black colour, foul odour, and aggressive behaviour.
Australia has numerous venomous species, including the Red-bellied Black Snake, spiders, scorpions, octopus, jellyfish, molluscs, stonefish, stingrays, and the platypus.
The emu is the tallest bird in Australia, reaching up to 2 metres in height. Other birds include the kookaburra, a large terrestrial kingfisher with a prominent beak and a distinctive bird call that sounds like human laughter. Australia is also home to around one-eighth of the world's parrots and two-thirds of the world's cockatoos.
