Recluse Spider

Recluse spiders, genus Loxosceles, are a group of ground-dwelling, non-web-building hunters found in warm and temperate regions of the Americas, southern Europe, and parts of Africa. As their common name suggests, they are shy and secretive, preferring to remain hidden in dark, undisturbed places rather than venture into the open.

The most recognizable feature of a recluse spider is a dark, violin- or fiddle-shaped marking on the top of the cephalothorax, with the neck of the violin pointing toward the abdomen, though this pattern can be faint or absent in some individuals and is not unique to this genus alone. A more reliable identifying trait is the arrangement of the eyes: unlike most spiders, which have eight eyes, recluse spiders have only six, arranged in three well-separated pairs forming a shallow semicircle across the front of the head.

These spiders do not spin a capture web to catch prey; instead they build a loose, irregular sheet of silk purely as a retreat and actively hunt on foot at night, returning to their hidden shelter during the day.

• Uniform tan, light brown, or yellowish-brown body without bold patterning aside from the possible violin marking
• Dark violin- or fiddle-shaped mark on the cephalothorax in many, but not all, individuals
• Six eyes arranged in three widely spaced pairs, unlike the eight eyes of most other spiders
• Long, relatively slender legs without conspicuous spines
• No capture web; instead builds a loose, irregular silk retreat in a sheltered crevice
• Lookalikes include various brown, non-descript spiders, so the six-eye arrangement is the most reliable feature for confirmation

Recluse spiders favor dry, dark, undisturbed spaces both outdoors and indoors, including woodpiles, leaf litter, loose bark, rock crevices, sheds, garages, attics, closets, and cardboard storage boxes. They are found across parts of the Americas, with additional native and introduced populations in southern Europe and Africa, and are most active during warm months, though indoor populations may remain active year-round.

Recluse spiders are nocturnal, ground-active hunters that leave their silk retreat after dark to search for prey rather than waiting in a web. Their diet consists of small insects and other arthropods encountered while wandering. During the day they remain hidden and motionless in their retreat, and they generally avoid open, well-lit, or frequently disturbed areas, which is central to their reclusive reputation. In natural settings they contribute to controlling populations of ground-dwelling insects.

Females produce silk egg sacs, each containing dozens of eggs, which are kept within or near the retreat. Spiderlings hatch and disperse to establish their own hidden shelters, growing through several molts over roughly one year before reaching maturity. Adults can live for multiple years in sheltered conditions, with activity slowing during cold weather in temperate parts of their range.