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American Focus > Blog > Tech and Science > ‘Bone Collector’ Caterpillar Wears Dead Bugs to Steal Prey From Spiders : ScienceAlert
Tech and Science

‘Bone Collector’ Caterpillar Wears Dead Bugs to Steal Prey From Spiders : ScienceAlert

Last updated: April 24, 2025 2:15 pm
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‘Bone Collector’ Caterpillar Wears Dead Bugs to Steal Prey From Spiders : ScienceAlert
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A Rare Caterpillar Species: The Bone Collector

In the vast and unpredictable world we live in, survival strategies can vary greatly among different species. One such remarkable strategy has been observed in a unique insect found exclusively on the mountainside of O’ahu.

Scientists have recently discovered a species of caterpillar that they have aptly named the ‘bone collector’. This extraordinary insect is not only a carnivore but also a cannibal. What sets it apart is its ability to disguise itself by dressing in the body parts of deceased insects, allowing it to move undetected and steal prey from unsuspecting spiders.

Unlike any other caterpillar species observed before, the bone collector has only been spotted 62 times in the past two decades of fieldwork. This rarity highlights the importance of targeted conservation efforts to safeguard its existence in the ecosystem.

Belonging to the Hyposmocoma genus, this newly described insect has raised eyebrows in the scientific community with its fascinating behavior.

Carnivorous 'Bone Collector' Caterpillar Dresses in Dead Bugs to Steal Food From Spiders
Little coats of dead insects made by bone collector caterpillars. (Rubinoff lab, Entomology Section, University of Hawaii, Manoa)

Caterpillars, the larval stage of Lepidoptera insects such as butterflies and moths, are typically herbivores. However, carnivorous species constitute a mere 0.1 percent of the known butterfly and moth species, with a preference for slow-moving or stationary prey.

The bone collector’s modus operandi involves infiltrating spider webs by camouflaging itself with pieces of dead insects bound together with silk. Once inside, it feasts on trapped insects and even raids the spider’s food reserves.

Carnivorous 'Bone Collector' Caterpillar Dresses in Dead Bugs to Steal Food From Spiders
An adult female of the species (left), and the case made by one of the larvae (right). The unlabelled parts of the case are all shed from the host spider. (Rubinoff et al., Science, 2025)

Research conducted by entomologist Daniel Rubinoff and his team at the University of Hawaiʻi at Mānoa revealed the intricate and bizarre lifestyle of the bone collector caterpillar.

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These caterpillars exhibit a clear preference for insect body parts or shed spider skin when constructing their protective nests in laboratory settings, showcasing their unique dietary habits and adaptations.

Despite their low numbers and solitary nature, these creatures have managed to survive for millions of years, adapting to changing environments and evolving their survival tactics.

However, the bone collector’s limited range and increasing environmental threats, including invasive species encroaching on its habitat, pose a significant risk to its continued existence.

Conservation efforts are crucial to ensure the preservation of this intriguing species and prevent its disappearance from the delicate ecosystem it calls home.

The groundbreaking research on the bone collector caterpillar has been published in the prestigious journal Science.

The Benefits of Regular Exercise

Regular exercise is essential for maintaining a healthy lifestyle and can have numerous benefits for both physical and mental well-being. From reducing the risk of chronic diseases to improving mood and energy levels, incorporating exercise into your daily routine can have a positive impact on overall health.

One of the most significant benefits of regular exercise is its ability to reduce the risk of developing chronic diseases such as heart disease, diabetes, and obesity. Physical activity helps to improve cardiovascular health by strengthening the heart and improving blood circulation. This can lower blood pressure, reduce cholesterol levels, and decrease the risk of heart attacks and strokes. Additionally, regular exercise can help to regulate blood sugar levels and improve insulin sensitivity, which can reduce the risk of developing type 2 diabetes.

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Exercise also plays a crucial role in weight management and can help to prevent obesity. By burning calories and building muscle, physical activity can help to maintain a healthy weight and reduce body fat. This can improve overall health and reduce the risk of obesity-related conditions such as high blood pressure, high cholesterol, and joint pain.

In addition to the physical benefits, regular exercise can also have a positive impact on mental health. Physical activity releases endorphins, which are chemicals in the brain that act as natural painkillers and mood elevators. This can help to reduce feelings of stress, anxiety, and depression, and improve overall mental well-being. Exercise has also been shown to improve cognitive function and memory, which can enhance productivity and focus.

Furthermore, regular exercise can boost energy levels and improve sleep quality. Physical activity increases blood flow and oxygen delivery to the muscles, which can help to reduce fatigue and increase endurance. This can improve overall energy levels and make daily tasks feel less tiring. Additionally, exercise can help to regulate sleep patterns and improve the quality of restful sleep, which can have a positive impact on overall health and well-being.

In conclusion, regular exercise has numerous benefits for both physical and mental health. From reducing the risk of chronic diseases to improving mood and energy levels, incorporating physical activity into your daily routine can have a positive impact on overall well-being. Whether it’s going for a run, taking a yoga class, or lifting weights at the gym, finding a form of exercise that you enjoy and can stick with is key to reaping the benefits of regular physical activity.

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