Meet the spricket: a tiny, whip-tailed predator hiding in your garden soil

Nature · Published 3 October 2026 Swipe more like this →

In short: Smaller than a fingernail, these arachnids are masters of the shadows. Known as schizomids, they navigate the dark using sensory legs instead of eyes. Despite their delicate, soft-bodied appearance, they are relentless hunters that can survive months without food, thriving in environments ranging from tropical rainforests to snowy mountain rocks.

Schizomida, often called sprickets or short-tailed whip-scorpions, are an order of arachnids typically measuring under 5 millimetres. Their name, derived from the Greek for 'split middle,' describes their unique prosoma, which is divided into distinct plates. While they lack functional eyes, some species possess vestigial spots capable of distinguishing light from darkness. They rely on a single pair of book lungs to breathe, a reduction from the two pairs found in related arachnid groups.

These creatures are primarily found in tropical and subtropical regions, though they have been introduced to European greenhouses via imported soil. Their habitat preferences are remarkably diverse; they occupy rainforest leaf litter, caves, and even termite mounds. Some species, like the Australian Draculoides vinei, have retreated into humid caves as their forest homes vanished, while others, such as the Californian Hubbardia briggsi, remain active in freezing, snow-covered conditions. They are highly sensitive to humidity and must avoid desiccation to survive.

As predators, schizomids are exceptionally patient. They use their first pair of legs as sensory probes to locate prey, which can range from springtails to other schizomids. Once a target is identified, they strike with pincer-like pedipalps, dismembering the victim before liquifying its tissues for ingestion. Their resilience is equally impressive; some individuals have endured five months of starvation in laboratory settings. Their mating ritual, known as the 'mating march,' involves a complex physical interaction where the male guides the female toward his spermatophore.

The evolutionary history of the group remains a subject of study. While modern species are small, the late Carboniferous fossil Proschizomus suggests the group may have once included much larger ancestors. Today, about 300 species are described, with the majority belonging to the family Hubbardiidae. Despite their global distribution, many species are highly localized, often known only from a single geographic spot, highlighting how much of this hidden, subterranean world remains to be discovered.

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