
Among freshwater turtle species, the pig-nosed turtle (Carettochelys insculpta) is particularly unique, found only in Papua and parts of northern Australia. Its pig-like snout and flipper-like limbs set it apart from other turtles. However, these distinctive features have attracted not only researchers but also people who utilize it as pets, food, and trade commodities. The high level of exploitation has become one of the main factors threatening the survival of this rare species.
A Long History in Tradition

For the indigenous communities in southern Papua, the pig-nosed turtle is far from an ordinary animal. For a long time, it has been an integral part of daily life. Its meat and eggs are serve as important sources of protein, while in customary practices, it has even been used as a part of dowry in the Vriendschap River region. Traditional use is typically subsistence-based, meaning that only what is needed for household consumption is taken. As a result, its impact on wild populations has historically been relatively small.
When Market Demand Emerges

However, this situation began to change as market demand increased. Eggs and hatchlings were no longer viewed solely as food, but as valueable commodities. One story still remembered by the communities of Kao River dates back to 1997, when a foreign buyer reportedly arrived by helicopter to purchase large quantities of eggs. Since then, pig-nosed turtle eggs have come to be seen as “walking money,” symbolizing a shift from subsistence use to economic opportunity.
From Consumption to Commodity
Gradually, the role of these turtles has shifted. For many community members, eggs now hold greater economic value than as a food source. Hunters prefer to sell the eggs, while the meat of adult turtles is typically consumed locally. Searching for nests and harvesting eggs has since become the primary livelihood. By setting out early in the morning by boat, hunters can return home with a harvest of considerable value—often seen as more reliable than other occupations such as farming or fishing.
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Hatchlings (Tukik) as a Key Commodity
Over time, the market began to prefer hatchlings over eggs. Hatchlings are more resilient during long-distance transport, whereas eggs are easily damaged. As a result, people began incubating eggs before sale, since hatchlings could be sold at a higher price. This practice grew in popularity, further accelerating the intensive farming of pig-nosed turtles.
The Threat Behind the Benefits
For local communities, the pig-nosed turtle clearly provides economic benefits. However, excessive and continuous exploitation, combined with high dependence on natural resources and limited alternative livelihoods, is putting increasing pressure on its population. Without appropriate action, this species risks existing only in stories and memory.
The Path Toward Conservation
Pig-nosed turtles are more than just rare animals—they are the guardians of Papua’s river ecosystems. With their limited range and protected status, conservation efforts are crucial. Protecting them requires a combination of actions: safeguarding habitats from degradation, regulating use to prevent overexploitation, providing alternative sources of income for local communities, and raising awareness about the importance of this species. Without concrete actions, this unique turtles could disappear from the wild. Saving them is not just about protecting a single species, but also about maintaining the balance of the river and the life that depends on it.









Unlike most freshwater turtles, which have only webbed feet, pig-nosed turtles actually have flipper-like limbs similar to those of sea turtles. This unique adaptation makes it extremely agile in the water. Using a movement often referred to as “underwater flight,” it propel itself by alternating or synchronizing it front flippers, while the hind flippers act as rudders. This body design makes it a formidable swimmer capable of navigating fast-moving river currents, while also giving them an advantage when hunting for food or evading predators.
One of the pig-nosed turtle’s most remarkable adaptations is the way it breathes. In addition to using lungs like other reptiles, it can also absorb oxygen through its cloaca—an opening near the tail. Inside are specialized, highly vascularized sacs known as cloacal bursae, which enable oxygen directly from the water. Thanks to this trick, pig-nosed turtles can stay underwater for hours without surfacing frequently. This is particularly helpful in murky waters or when resting peacefully while remaining safe from predators.
The pig-nosed turtle’s most iconic feature is its snout—long, flexible, and pig-like, with highly sensitive nostrils. This specialized structure functions almost like an underwater sensor, capable of detecting vibrations and scents even in murky rivers. With this ability, the turtle can sniff out prey such as small fish, mollusks, shrimp, or even fruit that has fallen from the forest into the water. Its flexible snout is also essential for squeezing into narrow gaps between rocks and roots, makes it an expert hunter in their habitat.
A study of the Kao River identified 97 sandbanks with the potential to serve as nesting sites for pig-nosed turtles. In reality, however, only six of these locations were actually in use, with active nests. Five other locations contained only nesting traces, while the majority were empty; in fact, many had been submerged by flooding at the time of the observation.
Pig-nosed turtle nests turn out to have a clever natural design. On average, the nest is about 15 cm in diameter and 18 cm in depth—enough to hold dozens of eggs while remaining hidden. Its location is also carefully chosen: typically at the top of a relatively high sand dune, nearly one meter above the river’s surface, and about 12 meters from the water’s edge. This positioning reduces the risk of flooding.
Based on observations, a total of 715 pig-nosed turtle eggs were found in various nests. The number per nest varied: some contained as many as 29 eggs, while others were empty or contained only a few, likely because they had been preyed upon by predators. On average, each egg measures about 4 cm in size and weighed 50 grams—quite large for a freshwater turtle. However, their large size actually makes them vulnerable to predators, both mammals and humans.








Male Dominance at Peak Lekking Season