Giant House Spider
Eratigena atrica
The giant house spider (Eratigena atrica) is a large, common European spider from the funnel-weaver family (Agelenidae) and one of the biggest arachnids found in human dwellings. Its body length ranges from 10 to 18 mm, while its long, hairy legs span 35 to 80–100 mm. It has a brownish-gray to dark brown body with a distinct pattern on the abdomen and two longitudinal stripes on the cephalothorax. Unlike its smaller relative, the domestic house spider (Tegenaria domestica), its legs are uniformly colored without dark banding. Strongly synanthropic, Eratigena atrica often inhabits basements, garages, attics, and dark corners, though it also lives outdoors under rocks and in tree hollows. It is nocturnal and renowned for its rapid running speed. This species builds flat sheet webs ending in a funnel-shaped retreat to catch small invertebrates. Despite its intimidating size, it is shy and completely harmless to humans.