The antlion larva is a master of the pitfall trap and biological engineering

Nature · Published 3 October 2026 Swipe more like this →

In short: Antlions are a diverse family of roughly 2,000 insect species, famous for the predatory larvae that construct ingenious sand pits to ensnare passing ants. While these pit-building hunters are the most recognizable, the family includes many other species that employ different, less-studied strategies to survive in dry, sandy environments.

The antlion, belonging to the family Myrmeleontidae, is defined by its predatory larval stage. While the name suggests a fierce hunter, the term likely stems from a classical translation where 'ant' refers to its primary prey and 'lion' denotes a destroyer. These larvae are often called doodlebugs in North America due to the winding, spiraling trails they leave behind when relocating across sandy terrain.

Physically, the larvae are built for ambush. They possess a robust, plump body and a flattened head equipped with massive, sickle-shaped jaws. These jaws are not just for grasping; they feature hollow projections that inject venom to immobilize prey and enzymes to digest soft tissues. To anchor themselves while subduing victims larger than themselves, their bodies are covered in forward-pointing bristles that provide necessary traction in loose soil.

One of the most peculiar aspects of antlion biology is their digestive system. Unlike most insects, the larvae lack an anus. They store all metabolic waste throughout their development, using some to spin silk for their cocoons and voiding the remainder as meconium only after reaching the pupal stage. While species like Euroleon nostras are well-known for their pitfall traps, many other antlions remain understudied, often hiding under debris or ambushing prey among leaf litter rather than digging.

Adult antlions are rarely seen, as they are typically nocturnal and possess relatively short lifespans compared to their larval counterparts. They are often mistaken for dragonflies or damselflies, though they are easily distinguished by their prominent, clubbed antennae. Despite their worldwide distribution, they thrive most in warmer, tropical regions, though some species have successfully adapted to cold-temperate climates.

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