CLIMATE · VERIFIED DEVELOPMENT
Australian Ballista Spider Catapults Ants Using Prey‑Activated Silk Trap
WHY IT MATTERS
The discovery demonstrates a novel evolutionary adaptation, offering insights into prey‑specific hunting and providing a model for designing efficient, self‑triggering capture mechanisms in robotics and materials science.
What happened
Scientists in Australia have identified a ballista spider that uses a spring‑loaded silk snare to launch green tree ants. Unlike typical spiders that chase prey, the spider constructs a web that appears tuned to a single ant species.
When ants collide with the silk, they trigger a catapult mechanism that hurls them away. Researchers suggest the ants may even be lured into attacking the trap, causing self‑activation.
This is the first documented spider whose web is specialized for one prey type and the first where the prey initiates the trap. The find broadens knowledge of arachnid hunting tactics and could inspire new biomimetic engineering approaches.
PRIMARY SOURCES
This spider catapults ants
Mongabay · Sam Lee · Discovery and factual synthesis only; publisher copyright terms apply