Metallic Jumping Spider
Cosmophasis umbratica
Salticidae (Jumping Spiders), Order Araneae
Physical Description
Compact and robust body with a distinctively high, square cephalothorax and a slightly elongated abdomen. Features short, sturdy legs adapted for explosive jumping. The surface is adorned with iridescent scales that catch the light, giving it a metallic sheen.
Size Estimate
Body length typically ranges from 6 to 9 millimeters, with a proportionate leg span around 15 to 20 millimeters.
Coloration & Markings
Brilliant metallic green and turquoise iridescence covering the cephalothorax and abdomen, often complemented by contrasting dark bands and white markings near the eye region and pedipalps.
Web Type
Does not build a web to catch prey; instead, uses silk primarily to create silken retreat sacs for molting, sleeping, and egg-laying.
Eye Arrangement
Eight eyes arranged in three rows typical of jumping spiders: four large anterior eyes facing forward providing exceptional binocular vision, with two smaller posterior-median eyes and two larger posterior-lateral eyes.
Leg Characteristics
Short to medium length, muscular, and robust. The anterior legs are often slightly sturdier and equipped with dense scopulae (pads of hairs) to aid in gripping various surfaces.
Venom & Safety Information
Venom Information
Possesses mild neurotoxic venom used primarily to subdue small invertebrate prey. It poses no chemical threat to humans.
Medical Significance
Harmless to humans. Bites are extremely rare, typically only occurring if the spider is directly pressed against the skin. Symptoms are minimal, usually limited to minor localized irritation.
Safety Recommendations
No special precautions needed. If relocation from indoors is desired, gently guide the spider into a small container using a piece of paper.
Habitat & Behavior
Habitat & Range
Found primarily in Southeast Asia, including regions like Singapore, Malaysia, and Indonesia. Prefers foliage, tree trunks, and wooden structures in gardens, parks, and tropical forests.
Behavior & Temperament
Active diurnal hunter relying on acute eyesight to stalk and pounce on prey. Highly alert, curious, and quick to jump when disturbed, but generally docile toward humans.
Diet & Prey
Carnivorous, feeding on small insects such as flies, mosquitoes, ants, and other small spiders, captured via an active stalking and leaping technique.
Seasonal Activity
Most active during warmer daylight hours throughout the tropical wet and dry seasons, slowing down slightly during cooler or heavily rainy periods.
Description
The Metallic Jumping Spider is a dazzling gem of the arachnid world, easily recognized by its vibrant turquoise and green iridescent sheen. As a member of the jumping spider family, it possesses extraordinary vision and acrobatic hunting prowess, darting across wooden garden furniture and foliage in search of prey while fascinating human observers with its inquisitive demeanor.
Key Features
Brilliant metallic green/turquoise coloration, compact jumping spider body shape, large forward-facing eyes, and active stalking behavior.
Similar Species
Other species within the genus Cosmophasis or other brightly colored jumping spiders (family Salticidae), distinguished primarily by specific iridescent patterns and geographic location.
Life Cycle
Females construct silken retreat nests where they guard a small batch of eggs. Spiderlings emerge after a few weeks, undergo multiple molts, and mature within a year.
Ecological Importance
Acts as an effective natural pest control agent by keeping populations of small garden insects and flies in check.
Conservation Status
Not evaluated by the IUCN, but populations are generally stable in their native tropical forest and garden habitats.
Interesting Facts
Jumping spiders can leap up to 50 times their own body length using a sudden hydraulic pressure change in their legs. Their complex vision includes color perception in the ultraviolet spectrum.
Photography Tips
Use a macro lens in bright natural daylight or with a diffused flash to properly capture the brilliant metallic iridescence and intricate eye details.
Identified: 2026-08-15T04:23:20.195612