Jumping Spider

Jumping spiders make up the family Salticidae, the largest spider family in the world with thousands of described species. They are immediately recognizable by their compact, often furry bodies and their unusually large forward-facing anterior median eyes, which give them the best vision of any spider group and a distinctly alert, curious appearance.

Rather than relying on webs to capture prey, jumping spiders are active daytime hunters that stalk prey visually and pounce with a sudden, powerful leap—a hunting method the family is named for. Many species, such as the bold jumping spider (Phidippus audax) common in North America, display iridescent or metallic coloring on their chelicerae or abdomen.

Found nearly worldwide, jumping spiders occupy an enormous range of habitats, from gardens and forests to building exteriors, and are considered one of the most visually engaging spider groups due to their keen vision and seemingly inquisitive behavior toward observers.

• Body: compact, often stocky and hairy or velvety in texture, with a wide range of colors and patterns depending on species.
• Eyes: eight eyes total, with a very large, forward-facing pair of anterior median eyes giving a distinctive 'big-eyed' face.
• Size: most species range from about 4–18 mm in body length; Phidippus audax is typically around 10–15 mm.
• Movement: short, deliberate walking punctuated by sudden jumps, rather than continuous scurrying.
• Lookalikes: sometimes mistaken for other small hairy spiders, but the oversized front eyes and jerky, investigative head movements are unique to this family.

Jumping spiders are found on every continent except Antarctica and occupy an unusually broad range of habitats, including gardens, meadows, forests, and the sunny sides of buildings and fences. They favor sunlit surfaces where they can visually track prey and bask in warmth.

They are active during the day, in contrast to many other spider groups, and are commonly seen on walls, plant foliage, and window sills in warmer months from spring through fall.

Jumping spiders are visual hunters that stalk prey slowly before launching a sudden jump to capture it, using silk primarily as a safety dragline during the leap rather than for building a capture web. Their diet consists mainly of small insects and other arthropods they detect and track using their exceptional eyesight.

They are notably curious and responsive to movement, often turning to visually track a nearby observer, a behavior linked to their unusually acute vision among spiders. When threatened, they can bite in defense, though their first response is typically to leap away from a disturbance.

Jumping spiders undergo simple spider development: egg, spiderling through several molts, and adult, without a pupal stage. Females lay eggs within a silk-lined retreat, often under bark or in a curled leaf, and may guard the egg sac until hatching.

Spiderlings disperse after hatching and molt several times as they grow toward maturity, a process that typically takes a few months. Many species complete one generation per year, with some overwintering as immature spiders in sheltered retreats.