Despite their monstrous looks and ruthless killing behavior, antlions pose absolutely no threat to any living being much larger than themselves. ... There is usually no need to use pesticides to kill antlions; instead, simply mix small gravel or non-sandy soil into the areas where antlions dig their pits.

Are antlions harmful?

Antlions are not harmful and do not damage plants, structures, or soil. Considered beneficial insects because they feed on ants and other small prey, they do not need to be controlled. They are an interesting curiosity to watch build their traps and catch their victims.

What do antlions do?

antlion, (family Myrmeleontidae), any of a group of insects (order Neuroptera) that are named for the predatory nature of the larva, which trap ants and other small insects in pits dug into the ground. Antlions are found throughout the world, primarily in dry, sandy regions.