The platypus, or duck-billed platypus, is a semi-aquatic, egg-laying mammal native to eastern Australia, including Tasmania. It is not found in Austria.
Characteristics | Values |
---|---|
Scientific Name | Ornithorhynchus anatinus |
Alternative Name(s) | Duck-billed Platypus |
IUCN Conservation Status | Near Threatened (NT) |
Length | 38-60cm |
Weight | 0.6-3.7kg |
Habitat | Freshwater rivers, wetlands, billabongs, estuaries |
Diet | Insects, shellfish, worms, shrimp, tadpoles, freshwater crayfish, etc. |
Reproduction | Egg-laying |
Venomous | Yes |
What You'll Learn
Platypuses are native to Australia
The platypus is a curious mammal that combines the characteristics of many different species. It has a duck-like bill, a beaver-like tail, otter-like feet, and dense, dark brown fur with light brown/silver underfur. Platypuses are well adapted for their semi-aquatic lifestyle, with streamlined bodies, broad flat tails, and short limbs with webbed feet. They use their front webbed limbs and partially webbed hind feet to propel themselves through the water and steer, respectively.
Platypuses inhabit freshwater rivers, wetlands, and billabongs in Australia and occasionally venture into brackish estuaries. They are bottom-feeders, hunting for insects, shellfish, and worms. Platypuses have a unique electromechanical system of electroreceptors and touch receptors that allow them to navigate underwater, detecting tiny electrical currents generated by the muscular contractions of their prey.
The female platypus lays her eggs in an underground burrow that she digs near the water's edge. Baby platypuses hatch after about 10 days and nurse for up to four months before they can swim and forage on their own. Platypuses are protected by legislation in all the states they occur in, and they are considered a "near-threatened" species by the IUCN.
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They are semi-aquatic
The platypus (Ornithorhynchus anatinus) is a semi-aquatic mammal native to Australia. Its semi-aquatic nature is reflected in several physical characteristics and behaviours. Platypuses have dense, thick fur that helps them stay warm underwater. The fur is waterproof and traps an insulating layer of air to keep the body temperature stable, even in cold water. The long guard hairs protect the soft underfur, which remains dry even after hours in the water. Platypuses also have big webbed feet that help propel them through the water, and the claws make digging burrows a breeze.
The platypus's paddle-shaped tail, similar to that of a beaver, serves as a stabilizer during swimming and stores extra fat for energy. The partially webbed hind feet act as rudders and brakes in the water. Platypuses are excellent swimmers, with a unique swimming style among mammals. They propel themselves by alternating strokes of the front feet, while the webbed hind feet are held against the body and used for steering along with the tail. They can maintain a relatively low body temperature of about 32 °C (90 °F) while foraging for hours in water below 5 °C (41 °F).
Platypuses occupy freshwater systems, including river basins, lakes, ponds, and streams throughout their habitat range. They spend about 10 to 12 hours a night in the water, hunting for food. They are most active at night and during dusk, as they are nocturnal. Platypuses feed on various prey, including insect larvae, freshwater shrimp, crayfish, worms, and tadpoles, using their sensitive bills to detect prey through electroreception. They close their eyes, ears, and nostrils when foraging underwater, relying solely on their electrosensory system to navigate and locate prey.
Platypuses construct burrows along rivers and streams, where they rest during the day. The entrances to these burrows are usually hidden under a tangle of roots, providing cover and protection. Overall, the physical adaptations, hunting strategies, and habitat preferences of platypuses reflect their semi-aquatic nature, allowing them to thrive in the freshwater environments of eastern Australia.
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Platypuses are one of the few venomous mammals
The platypus's venom contains at least 19 proteins that fall into three categories: defensin-like peptides, C-type natriuretic peptides, and nerve growth factor. These toxins disrupt haemostasis (blood regulation), cell membranes, and nociception (pain regulation), resulting in nausea, swelling, and excruciating pain that cannot be alleviated by morphine. The different chemicals in the venom have various effects, from lowering blood pressure to causing pain and increasing blood flow around the wound. While the venom is not used to kill prey, it serves as a defensive mechanism and a way to assert dominance during the breeding season.
The platypus's venom system is similar to that of echidnas, another group of monotremes. Young female platypuses have vestigial spurs that are lost within their first year, while males develop a venom gland connected to their spurs. This sexual dimorphism suggests that venom plays a role in male competition for mates.
The platypus is a semi-aquatic mammal native to eastern Australia, including Tasmania. Its unusual appearance, with a duck-like bill and beaver-like tail, initially baffled European naturalists when it was first discovered. This distinctive creature has become a recognisable symbol of Australia and is culturally significant to several Aboriginal peoples.
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They are egg-laying mammals
Platypuses are one of the only five known mammals that lay eggs. This makes them monotremes, a group of mammals that also includes four species of echidnas. Monotremes are found only in Australia and New Guinea.
The platypus (Ornithorhynchus anatinus), sometimes referred to as the duck-billed platypus, is a semi-aquatic mammal endemic to eastern Australia, including Tasmania. Platypuses are highly elusive, so little is known about their daily habits and mating rituals. They are mostly nocturnal, spending their days in burrows dug into stream banks and becoming active at dusk to hunt for small animals like shrimp and crayfish.
The platypus is the sole living representative of its family, Ornithorhynchidae, and genus, Ornithorhynchus. It has a unique appearance, with a duck-like bill, beaver-like tail, and otter-like feet. Its dense, brown fur is biofluorescent, giving off a bluish-green glow under black light.
Female platypuses lay one to three (usually two) small, leathery eggs, similar to those of reptiles. The eggs develop in utero for about 28 days, followed by about 10 days of external incubation. Newly hatched platypuses, known as "puggles," are vulnerable, blind, and hairless. They are fed by the mother's milk, which is released through pores in the skin and pooled in grooves on her abdomen. After three to four months, the young emerge from the burrow.
Platypuses are long-lived animals, with a lifespan of up to approximately 20 years in the wild. They are protected by law in Australia and are considered a "near-threatened" species by the IUCN.
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Platypuses are found in Tasmania and the Australian Alps
The Australian Alps, located in the southeast corner of Australia, span over 4,760 miles across the Australian Capital Territory, New South Wales, and Victoria. The Alps feature a variety of ecosystems, including low-altitude bogs and fens, plateaus, lakes, and snow-peaked mountains. Mount Kosciuszko, located in Kosciuszko National Park, is the tallest peak in the Australian Alps, reaching a height of 7,310 feet.
Platypuses are well-adapted to their aquatic lifestyle, with a streamlined body, dense waterproof fur, and strong front limbs used for swimming and digging. They feed on aquatic insects, insect larvae, freshwater shrimp, and crayfish, using their sensitive bills to detect prey. Platypuses are typically shy and solitary creatures, spending most of their time in the water or resting in burrows dug into riverbanks.
In Tasmania, Platypuses can be observed at Platypus House in Beauty Point, where visitors can learn about these unique mammals and see them actively feeding and playing during a guided tour.
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Frequently asked questions
Platypuses are native to Australia and can be found in the eastern regions of the country, including Tasmania. They inhabit freshwater systems such as rivers, lakes, ponds, and streams.
Platypuses have a unique appearance, often described as a combination of different animal features. They have a duck-like bill, beaver-like tail, otter-like feet, and dense, dark brown fur with lighter patches under the eyes.
Platypuses are not currently considered endangered but are listed as "near threatened" by the International Union for Conservation of Nature (IUCN). Their populations may be vulnerable to human activities such as dam construction, pollution, and habitat destruction.