Huntsman Spider

Huntsman spiders belong to the family Sparassidae, a group of roughly 1,300 species distributed through the tropics and subtropics, with particular diversity in Australia, Southeast Asia, and Africa. Their name comes from their active hunting style: rather than spinning webs, huntsmen chase down prey using bursts of remarkable speed. Some of the largest species, such as the giant huntsman spider of Laos, have leg spans that rival small dinner plates, making them among the largest spiders in the world by leg span.

Despite their imposing size, huntsman spiders are generally shy and would rather flee than confront a large animal. Their flattened bodies are an adaptation for squeezing into narrow spaces such as bark crevices, under loose rocks, and behind wall hangings, which is why they are frequently discovered indoors, sometimes to a homeowner's surprise.

Huntsman spiders are considered beneficial predators in gardens and homes because they feed on a wide range of insects, including cockroaches, moths, and other pests, helping to naturally suppress their populations.

• Long legs held out to the sides in a crab-like posture rather than forward and back
• Flattened, oval body allowing the spider to fit into tight crevices
• Coloration typically gray, brown, or tan, sometimes with mottled or banded leg patterns for camouflage against bark
• Eight eyes arranged in two rows across the front of the head
• Capable of remarkably fast, sideways sprinting movement, unlike the slower gait of most large spiders
• Lookalikes include wolf spiders, which hold their legs forward rather than to the side, and tarantulas, which are far bulkier and hairier

Huntsman spiders are found throughout tropical and subtropical regions worldwide, with the richest diversity in Australia, Southeast Asia, and parts of Africa. They favor the loose bark of trees, rock crevices, leaf litter, and log piles, and readily move into human structures such as garages, sheds, and homes, particularly during cooler months or rainy seasons when shelter is sought. Some coastal and desert-adapted species live under stones or in sand burrows instead of on vegetation.

Unlike orb-weaving spiders, huntsmen do not build webs to capture food. Instead, they actively stalk and pursue insects, other spiders, and small invertebrates, relying on speed and keen vision to close the gap before pouncing. They are primarily nocturnal, resting flattened against bark or in crevices during the day and becoming active at dusk. When disturbed, a huntsman's first response is almost always to flee rapidly rather than stand its ground. Female huntsman spiders of some species show notable maternal care, guarding their egg sac and even remaining with the spiderlings for a period after hatching, which is unusual among spiders.

Female huntsman spiders spin a flattened, disc-shaped silk egg sac that they carry beneath their body or attach to a sheltered surface, standing guard over it until the spiderlings emerge. In several species the mother stays with the newly hatched young for days or weeks, a rare example of maternal care among spiders. Spiderlings disperse to hunt independently, molting repeatedly over the following months as they grow toward adulthood. Most huntsman spiders reach maturity within a year and live for one to two years total, with development speed varying by climate and species.