Lexi Webster
Australia's unique wildlife is world-renowned, and for good reason. The continent's geographical isolation has allowed its fauna to evolve separately from the rest of the world, resulting in a high level of endemism. This means that many of Australia's animals are found nowhere else on Earth. Sadly, the introduction of foreign species has had a disastrous impact on the country's native wildlife, with hundreds of species becoming extinct since European settlement. Despite this, Australia is still home to a diverse range of animals, including the iconic kangaroo, koala, and platypus. The country is also known for its unique birds, such as the kookaburra, whose call sounds like human laughter, and the cassowary, the heaviest flightless bird in Australia. One of Australia's most famous native animals is the Tasmanian devil, a carnivorous marsupial that plays a crucial role in the ecosystem of its namesake island.
| Characteristics | Values |
|---|---|
| Three native animals in Australia | Koala, Kangaroo, Platypus |
| Types of mammals in Australia | Monotremes, Marsupials, Placentals |
| Number of kangaroos in Australia | 50 million |
| Number of species of kangaroos | 55 |
| Weight of kangaroos | Up to 90 kg |
| Hopping speed of kangaroos | 70 km/h |
| Height of kangaroos | Up to 2.1 meters |
| Height of koalas | Up to 60 cm |
| Weight of koalas | Up to 14 kg |
| Sleeping hours of koalas | 18-22 hours |
| Food intake of koalas | Up to 1 kg of eucalyptus leaves |
| Platypus habitat | Rivers, lakes, and creeks in eastern Australia |
| Platypus features | Duck-like bill, webbed feet, beaver-like tail |
| Platypus diet | Stores fat in the tail for food shortage |
| Venomous species in Australia | Spiders, Scorpions, octopus, jellyfish, molluscs, stonefish, stingrays |
| Invasive species causing extinctions | European wasp, red fire ant, yellow crazy ant, feral honeybees |
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What You'll Learn
The koala, a fluffy tree-dwelling marsupial
Koalas live in complex social groups, with each koala maintaining its own "home range" area. These home ranges consist of a number of 'home range trees' and 'food trees' that provide food, shelter, and places for social contact. Koalas are highly territorial, and even after a koala has died, other koalas will usually avoid its home range for about a year until the scent and markings of the previous owner have disappeared.
Koalas are very picky eaters, with strong preferences for different types of gum leaves. They have sharp front incisors to nip leaves from the tree and molars to cut and shear the leaves. They are known to occasionally eat leaves from other native Australian trees, such as wattle, tea tree, or paperbark.
In the 2019-2020 bushfire season, koalas lost substantial portions of their habitat, and they have been identified by the Australian government as one of 113 animals requiring urgent help. Conservation efforts are underway to protect koala habitats and ensure their survival.
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The kangaroo, a large hopping marsupial
The kangaroo is a large marsupial native to Australia, also found in Tasmania and nearby islands. It is a member of the animal family Macropus, which means "big foot". This is fitting, as their large feet allow them to leap up to 30 feet (9 meters) in a single bound, and travel more than 30 miles (48 kilometers) per hour. They are the tallest of all marsupials, standing over 6 feet (2 meters) tall.
Kangaroos are herbivores and have a chambered stomach that is functionally similar to those of ruminants like cattle and sheep. They occupy the ecological niche filled elsewhere by grazing and browsing animals. Kangaroos tend to live in large groups, known as mobs, which can range from small groups to more than 50 or even 100 kangaroos. They are highly social and engage in nose touching and sniffing to build cohesion within the group.
Female kangaroos have a pouch, called a marsupium, where the newborn joey, or baby kangaroo, crawls into after birth. The joey remains in the pouch from anywhere between 120 and 400 days, depending on the species, and continues to feed off the mother for approximately a year and a half after leaving the pouch. Females produce two different types of milk, one for newborns and another for more mature joeys.
The kangaroo faces few natural predators, aside from humans and wild dogs called dingoes. The largest threats to kangaroos are heat, drought, and hunger due to habitat loss. Several conservation groups are working to protect kangaroos, including the San Diego Zoo Global, WWF, and Bush Heritage Australia.
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The dingo, Australia's biggest carnivorous mammal
Dingoes are Australia's biggest terrestrial carnivorous mammals. They are ancient breeds of wild dogs, closely related to the domestic dog, that were introduced to Australia by Asian seafarers around 4,000 years ago. Dingoes are opportunistic carnivores, and mammals form the main part of their diet, including rabbits, kangaroos, wallabies, and wombats. They also eat reptiles, insects, and birds when native species are scarce. Dingoes are solitary hunters but form larger packs when hunting bigger game. They are found all over Australia, except Tasmania, and are particularly common in the outback.
Dingoes have a long muzzle, large pointed ears, sharp teeth, and a brown furry coat with a bushy tail. They can have a single coat in the tropical north of Australia or a double thick coat in the cold mountains of the south. Dingoes are often regarded as pests by farmers, as they sometimes prey on livestock. However, they have been instrumental in keeping down populations of rabbits, feral pigs, and other farming pests. Dingoes are apex predators that play an important role in managing the populations of large herbivores, keeping ecosystems in balance.
Dingoes have a close relationship with Indigenous Australians, with whom they hunt and sleep. They are comfortable around humans but can also live independently. Dingoes are now considered native animals, as they have co-evolved with other Australian wildlife over thousands of years. Dingoes are also known for their ability to adapt to a wide variety of habitats, which has led to changes in the ecosystems of which they are a part.
Dingoes are classified as carnivores, with meat forming a significant part of their diet. They are known to feed on small animals, including mammals, birds, and reptiles. During mating season, dingoes are known to mingle with other wild dogs and hunt in packs of three to twelve animals. Dingoes typically have a lifespan of 3-5 years in the wild, with some living up to 7-8 years. In captivity, their lifespan increases to 14-16 years, and one dingo has been recorded to live just under 20 years.
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The platypus, a monotreme that lives in eastern Australia
The platypus is a monotreme, a semi-aquatic mammal native to eastern Australia, including Tasmania. It is one of only five remaining monotreme species, distinguished from other mammals by their egg-laying abilities. Platypuses are found in freshwater habitats, where they feed and navigate using a unique electromechanical system. This system allows them to detect prey in murky water through electrolocation.
Platypuses have a distinctive appearance, with a duck-like bill, webbed feet, and a beaver-like tail. They have dense, waterproof fur that provides excellent thermal insulation. Male platypuses have a spur on their hind foot that injects venom, making them one of the rare venomous mammals. This venom can cause intense pain and even be fatal to small animals.
Platypuses are well-adapted to their aquatic lifestyle, with a streamlined, torpedo-shaped body and strong front limbs for swimming and digging. They have odd skeletal features, including a robust shoulder girdle and a short, wide humerus. Their bill is covered in soft, sensitive skin, and they lack true teeth, instead having flat pads of hardened gum tissue.
Platypuses are generally solitary and crepuscular, most active around dawn and dusk. They can also be active during the day, depending on various factors such as the season and individual preference. Platypuses do not hibernate, and they have an unusually low body temperature for a mammal, at around 32°C. They can maintain a constant body temperature even in very cold water, dispelling the belief that monotremes cannot regulate their body heat.
Platypuses have been legally protected across all states where they live since 1912. While their population is not in grave danger, they face challenges from pollution, habitat loss, and invasive species. As a result, captive-breeding programs have been implemented, although with limited success.
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The Tasmanian devil, a small carnivorous marsupial
Tasmanian devils are mainly scavengers, feeding on the carcasses of dead animals, but they can also be effective predators. Their diet includes wallabies, small mammals, birds, reptiles, amphibians, and insects. In farming areas, they are known to feed on the carcasses of sheep and cattle. Devils are nocturnal, spending their nights roaming great distances in search of food. During the day, they hide in their dens or in dense bushland. They are not territorial but have a home range.
Tasmanian devils are widespread across Tasmania, from the coast to the mountains, seeking out areas where they can hide, shelter, and find food. They are common in Tasmania but are not currently found on the Bass Strait Islands. Devils were once abundant on mainland Australia, as evidenced by fossil remains, but they became extinct there around 3,500 years ago.
The breeding season for Tasmanian devils occurs between March and May. Their courtship rituals involve vocalizations and physical interactions. Male devils may engage in vocal duels and display aggressive behaviours to establish dominance and attract mates. After mating, the female's pregnancy lasts about 21 days, resulting in the birth of very undeveloped young. A mother Tasmanian devil gives birth to a litter of about 50 tiny babies, called imps, which are pink and hairless. The imps must race to the mother's rear-facing pouch, where they compete to attach themselves to one of only four available teats. Only those four imps will have a chance to grow and survive.
Tasmanian devils are listed as endangered, with a decline of more than 60% in the last 10 years, mainly due to a contagious facial tumour disease. They are protected under Tasmania's Threatened Species Protection Act 1995 and the Commonwealth's Environment Protection and Biodiversity Conservation Act 1999.
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Frequently asked questions
Koalas, kangaroos, and wombats.
Koalas are famous for being lazy. They sleep for 18-22 hours a day and spend the rest of their time eating eucalyptus leaves.
Yes, kangaroos can hop at speeds of up to 70 km/h (45 mph) and can leap up to twice their body height.
Wombats are Australia's second-largest marsupials. They can reach speeds of up to 40 kilometres (25 miles) per hour.
Other unique Australian animals include the platypus, echidna, dingo, Tasmanian devil, and cassowary.
