Leena Watts
The platypus is a semi-aquatic mammal native to Australia, and its diet primarily consists of small, soft-bodied prey. Platypuses are excellent swimmers and spend a lot of time in the water foraging for food. They have high-energy requirements and feed for 10 to 12 hours each day, even longer in colder conditions. Over time, the platypus's diet has changed, and it now includes a variety of bottom-dwelling aquatic insects, crustaceans, and small invertebrates. While the platypus is still considered common, its dependence on established freshwater systems and the impact of human activities on its habitat have led to concerns about its future decline.
| Characteristics | Values |
|---|---|
| Diet | Bottom-dwelling invertebrates, insect larvae, free-swimming organisms like shrimps, swimming beetles, water bugs, tadpoles, worms, freshwater pea mussels, snails, cicadas, moths, crayfish, and trout eggs |
| Dietary Changes | Young platypuses have teeth, but these fall out when they start eating solid food, after which they grind up prey using pads of hardened gum tissue at the back of their jaws |
| Feeding Behaviour | Platypuses forage most actively from dusk to dawn, sheltering during the day in burrows. They spend much of their time in the water foraging for food |
| Habitat | Rivers and the riparian zone in eastern Australia, Tasmania, and King Island |
| Status | Listed as a "Near Threatened" species in 2014, and at risk of extinction as of 2020 |
| Predators | Snakes, water rats, goannas, hawks, owls, eagles, and crocodiles |
| Protection | Banned or restricted use of opera house traps for catching yabbies in some Australian states |
| Physical Characteristics | Strong front limbs, flat torpedo-like body, dense waterproof fur, small eyes, and a unique electromechanical system of electroreceptors and touch receptors |
| Weight | Males: 1.7-6.6 lbs (800-3000 g); Females: 1.3-3.7 lbs (600-1700 g) |
| Length | Males: 15.7-24.8 in (400-630 mm); Females: 14.5-21.6 in (370-550 mm) |
| Breeding Season | Between June and October, with local variations |
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What You'll Learn
- The platypus's diet consists of small, soft-bodied prey
- They are non-selective feeders, eating whatever small invertebrates they encounter
- They have high energy requirements, foraging for 10-12 hours a day
- They are dependent on freshwater systems for feeding
- Their diet includes bottom-dwelling crustaceans and insects
The platypus's diet consists of small, soft-bodied prey
The platypus's diet reflects its aquatic habitat and foraging behaviour. Spending most of their time in the water, platypuses are excellent swimmers, propelling themselves with alternate strokes of their front feet while using their webbed hind feet and tail for steering. This allows them to cover a large area in their search for food. They typically forage for 10 to 12 hours each day, and even longer in colder conditions.
The platypus's bill is covered in soft, sensitive skin, and inside are flat pads of hardened gum tissue, which they use to grind their food into a fine paste. Platypuses also use gravel to help mash up their food, and they masticate it so thoroughly in their mouths that little additional processing is needed before the food reaches the intestines. This reflects the small size of their prey and the fact that they consume many small prey items over a long period of time.
The platypus's diet has likely been impacted by changes to its habitat due to human activity, such as land clearing and water extraction. These factors, along with climate change and severe drought, have led to concerns about the platypus's risk of extinction. While the platypus once occupied a wide range in Australia, local changes and fragmentation of its distribution have been observed.
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They are non-selective feeders, eating whatever small invertebrates they encounter
Platypuses are semi-aquatic mammals native to Australia. They are excellent swimmers and spend a lot of time in the water foraging for food. Platypuses have high energy requirements and typically forage for 10 to 12 hours each day, and even longer in colder conditions. They are non-selective feeders, eating whatever small invertebrates they encounter. This includes benthic invertebrates, particularly insect larvae, as well as free-swimming organisms like shrimps, swimming beetles, water bugs, tadpoles, worms, freshwater mussels, and snails. Platypuses also occasionally catch prey from the water surface, such as cicadas and moths.
The platypus's diet consists of small, soft-bodied prey items that are masticated quite finely even before they are swallowed. Platypuses have grinding pads made of keratin, a tough structural protein, that can reduce aquatic insects, shrimps, and worms to a fine paste. This thorough mastication means that little additional processing is required before the food reaches the intestines, and the platypus's stomach is small as a result.
The platypus's unusual feeding habits and biological features have long been a source of fascination and research interest. While the modern platypus has lost its teeth, its lineage retained a distinctive lower molar tooth row for over 95 million years until its relatively recent loss. Today, adult platypuses have developed flat pads of hardened gum tissue inside their bills, which are used for grinding food.
The platypus's diet has likely been impacted by changes to its habitat due to human activity. Platypuses are dependent on established freshwater systems and are particularly vulnerable to the extraction of water resources, land clearing, climate change, and severe drought. These threats have led to predictions of a decline in the platypus population and the extinction of local populations across a significant portion of its range.
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They have high energy requirements, foraging for 10-12 hours a day
Platypuses have high energy requirements and spend a large portion of their day foraging for food. They are excellent swimmers and spend most of their time in the water foraging for small invertebrates and soft-bodied prey. They feed on a variety of bottom-dwelling (or "benthic") aquatic insects, including caddisfly and mayfly larvae, water bugs, water beetles, dragonfly and damselfly larvae, and larval midges and blackflies. They also consume freshwater shrimps, snails, mussels, worms, and small crustaceans like crayfish. Platypuses have even been known to eat small goldfish in captivity.
The platypus's diet consists of small prey items that are masticated, or ground up, into a fine paste using grinding pads made of keratin—a tough structural protein found in mammalian claws, horns, and hooves. This process of mastication starts in the mouth, where the food is chewed so thoroughly that little additional processing is needed before the food reaches the intestines. As a result, the platypus's stomach is small and lacks the ability to produce digestive enzymes or hydrochloric acid.
The platypus's high energy requirements can be attributed to their foraging habits and the type of prey they consume. They typically forage for 10 to 12 hours each day, and sometimes even longer under colder conditions. During this time, they are actively swimming and diving in search of small, soft-bodied prey. The platypus's unique swimming style, with front feet propelling and hind feet steering, likely contributes to their high energy expenditure.
The platypus's dependence on freshwater systems for feeding is also a factor in their energy requirements. They have an electrical navigation system that only works in freshwater environments, limiting their feeding habitats. This dependence on established freshwater systems has led to concerns about their future decline, as human modifications to their habitat, such as water resource extraction and land clearing, continue to occur.
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They are dependent on freshwater systems for feeding
Platypuses are dependent on freshwater systems for feeding. They are excellent swimmers and spend much of their time in the water foraging for food. Platypuses have high-energy requirements and typically forage for 10 to 12 hours each day, or even longer in colder conditions. They feed on a variety of bottom-dwelling (or "benthic") aquatic insects, such as caddisfly and mayfly larvae, water bugs, water beetles, dragonfly and damselfly larvae, and larval midges and blackflies. They also eat free-swimming organisms like shrimps, swimming beetles, tadpoles, and at times worms, freshwater mussels, and snails.
The platypus's diet has likely changed little over time, but human impacts on its habitat and water resources may be affecting its food sources. Platypuses are found in a range of terrains, from the high country of Tasmania and the Australian Alps to lowland areas close to the sea. They have been observed swimming in saltwater, but they must feed in freshwater, where their electrical navigation system is operative.
The platypus's dependence on established freshwater systems may lead to their decline in the future. Local changes and fragmentation of distribution due to human modification of their habitat have been documented. In 2020, researchers from the University of New South Wales presented evidence that the platypus is at risk of extinction due to a combination of water resource extraction, land clearing, climate change, and severe drought.
The platypus's stomach is small and lacks the ability to secrete digestive enzymes or hydrochloric acid. This reflects their diet of small, soft-bodied prey items that are masticated quite finely before being swallowed. Platypuses have grinding pads made of keratin, which can reduce their prey to a fine paste without the need for additional abrasive agents.
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Their diet includes bottom-dwelling crustaceans and insects
Platypuses are semi-aquatic mammals that spend a lot of their time in the water foraging for food. They are excellent swimmers and have a unique swimming style, propelling themselves with alternate strokes of their front feet while keeping their webbed hind feet against their body for steering, along with their tails. They have high-energy requirements and typically forage for 10 to 12 hours each day, and even longer in colder conditions.
The platypus's diet consists of small, soft-bodied prey items that are masticated quite finely even before they are swallowed. Platypuses use gravel to help mash up their food, and their grinding pads, made of keratin, can reduce aquatic insects, freshwater shrimps, and worms to a fine paste without the need for other abrasive agents.
While the platypus must feed in freshwater, where its electrical navigation system is operative, it has been seen swimming in saltwater. They have also been known to dine on small goldfish after killing them in captivity.
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Frequently asked questions
The platypus's diet has not changed significantly over time. They continue to be non-selective feeders, consuming a variety of small invertebrates and soft-bodied prey found in freshwater systems.
The platypus diet consists mainly of benthic invertebrates, such as insect larvae, caddisfly, mayfly, and dragonfly. They also feed on free-swimming organisms like shrimps, swimming beetles, water bugs, tadpoles, worms, and freshwater mussels.
There may be some variation in the specific prey items consumed based on regional availability and local changes in their habitat due to human influence. However, overall, the platypus's diet remains consistent across different regions.
Despite the loss of teeth in modern platypuses, their diet has not changed significantly. They have adapted by developing flat pads of hardened gum tissue, which they use to grind their food into a fine paste, allowing them to consume small prey items.
Habitat changes, such as extraction of water resources, land clearing, and climate change, can lead to a decline in the platypus population and even local extinctions. This is because platypuses depend on established freshwater systems for their food and survival.
