Hasarius adansoni, the Adanson’s House Jumper, is a small salticid spider with a truly cosmopolitan home range. Originally native to Africa, it has spread widely through human activity and now occurs across southern Europe, Asia, Australia, the Americas, and many island regions. It is especially common in greenhouses, houses, and gardens, where warmth and shelter mimic its preferred tropical conditions.
 
Males measure around 6–7 mm and females 7–9 mm, making them much smaller than the Regal Jumping Spider (Phidippus regius), which can reach 14–22 mm. Despite their size difference, both species share the characteristic salticid traits of keen vision and agile hunting. H. adansoni is often encountered near people due to its adaptability, while P. regius remains more restricted to the southeastern United States. This contrast highlights how H. adansoni has become one of the most successful “house spiders” worldwide, thriving in diverse climates far beyond its African origins.