The Unexpected Strength of Female Mantises: A Deep Dive into Predatory Power

Female giant rainforest mantises (Hierodula majuscula) deliver a significantly more forceful strike than their male counterparts, a recent study reveals. This difference isn’t apparent from birth; it develops as the insects mature, with females ultimately exhibiting a striking advantage in predatory force. The research, published in the March issue of Physiological Entomology, sheds light on the mechanics of these ambush predators and raises new questions about the source of their power. Science News reports on the findings, highlighting the surprising disparity in strike force.

Ambush Predators and the Development of Force

Native to Australia, these mantises employ a “sit-and-wait” hunting strategy. Rather than actively pursuing prey, they remain motionless, blending into their surroundings. When an unsuspecting insect ventures within reach, the mantis unleashes a rapid, powerful strike using specialized raptorial legs. This isn’t a crushing blow, but a precise capture, utilizing sharp mouthparts to secure the meal. Researchers at Kiel University in Germany meticulously measured this strike force across different stages of the mantis lifecycle.

The study involved presenting the mantises with a fly larva encased in a transparent box attached to a force-measuring instrument. As expected, the mantises readily attacked the offering, providing researchers with quantifiable data on their strike power. The team observed that young mantises, having molted only twice, generated around 2.5 millinewtons of force. Adult males increased this to approximately 70 millinewtons, even as adult females delivered a substantial 196 millinewtons. This demonstrates a clear divergence in striking capability as the insects mature.

Scaling and the Mystery of Extra Power

Interestingly, the relationship between body size and strike force isn’t straightforward. While strike force generally correlates with muscle cross-sectional area, the researchers found that the mantises’ overall body weight increases at a faster rate than muscle area. So that smaller, younger mantises can, proportionally, deliver a surprisingly strong punch. However, the most puzzling finding is that adult female mantises strike with a force greater than predicted based solely on the size of their key muscle.

“I’m interested in scaling,” explains Thies Büscher, an entomologist at Kiel University. This observation suggests that other factors, potentially involving additional muscles or previously overlooked anatomical features, contribute to the female mantis’s exceptional striking power. The researchers hypothesize that some form of energy storage mechanism might be at play, similar to the latch-and-spring systems found in mantis shrimp or gall midge larvae, but haven’t yet identified any evidence to support this. Science Focus provides a detailed explanation of the mantis shrimp’s incredible striking mechanism, offering a potential analogy for the energy storage system researchers are seeking in mantises.

Beyond Force: How Mantises Consume Their Prey

The study by Büscher and his team focuses on the mechanics of the strike, but other research explores what happens after the capture. Evolutionary physiologist Christopher Oufiero of Towson University in Maryland has investigated the feeding habits of 14 mantis species. His lab observed the insects consuming over 300 flies, meticulously documenting their eating speed.

Oufiero’s research, published in February 2026 in Ecology and Evolution, revealed that adult female mantises, often masters of camouflage, are remarkably efficient eaters. They aren’t limited by their mouthparts and demonstrate a capacity to consume more than necessary for survival, exhibiting feeding behaviors more akin to spiders than typical insects. This suggests that the powerful strike isn’t just about securing a meal, but also about efficiently processing it.

What Does This Mean for Understanding Mantis Behavior?

The disparity in strike force between male and female mantises likely plays a role in their reproductive strategies. While the exact mechanisms are still under investigation, the increased power of females could be crucial for subduing larger prey, providing them with the resources needed to produce eggs. It also raises questions about potential competition between the sexes for food resources.

The discovery that females strike harder than predicted by muscle size opens up new avenues for research. Understanding the anatomical and physiological mechanisms behind this enhanced power could provide insights into the evolution of predatory behavior and the biomechanics of insect movement. Further investigation is needed to identify the additional muscles or anatomical structures that contribute to the female mantis’s formidable strike.

The Ongoing Research and Future Directions

Büscher’s team at Kiel University continues to investigate the source of the female mantis’s extra striking power. Future research will focus on detailed anatomical studies, examining the muscles and skeletal structures involved in the strike, as well as physiological experiments to assess energy storage and release mechanisms. Oufiero’s lab at Towson University plans to expand their research on mantis feeding behavior, exploring the relationship between prey size, strike force and digestive efficiency. Towson University’s website provides information about Oufiero’s research and the ongoing work in his lab.

The study of these fascinating predators highlights the complexity of the natural world and the importance of continued scientific inquiry. As researchers delve deeper into the mechanics of the mantis strike, they are not only unraveling the secrets of this remarkable insect but also gaining valuable insights into the principles of biomechanics and evolutionary adaptation.