Arachnid · GBIF taxon 10670284
Joro Spider
Trichonephila clavataAlso known as Jorō Spider, East Asian Orb-weaver
Joro spiders weave three-dimensional, golden-tinted orb webs that can span over a meter across between trees, shrubs, and building eaves. Large females display striking alternating stripes of yellow and dark blue-grey on the top of their abdomen, accompanied by bright red patches underneath. Hatchlings disperse in spring by ballooning through the air on silk threads, drifting on light breeze currents to settle across new landscapes.
Orb WeaverSilk ProducerIntroduced
—observations
—countries
—peak records
Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Diet & prey
- Brown marmorated stink bugs
- Mosquitoes
- Flies
Predators
- Birds
- Lizards
- Mud dauber wasps
ThreatsMinimal global threats; localized loss from heavy pesticide applications
HabitatsForest edges, gardens, urban parks, shrublands, and utility structures
Life span1 year
Size / weightNot available
Classification
- FamilyAraneidae
- SpeciesTrichonephila clavata
Range data is not available yet.
Interaction riskVery high
- Low
- Moderate
- High
- Very high
- Why interaction risk is very high
- Possesses weak venom that is not medically significant to humans; observe safely without pinching or grabbing.
- Why it is dangerous
- Venom is weak and small fangs rarely pierce human skin, causing only localized redness and brief, minor discomfort.
- How to recognize a risky encounter
- Recognized by its large web, bright yellow and slate-blue abdominal bands, yellow-ringed legs, and red undersides.
- What to do
- Avoid squeezing or crushing against skin; allow spiders to move away naturally if they fall onto clothing.
Responsible observation
- Web Dynamics: Look for golden-tinted silk webs spun high off the ground around porch lights or tree branches.
- Seasonal Timing: Expect large adult females from late summer through autumn before egg laying.
- Peaceful Coexistence: Leave webs intact in yards to benefit from natural pest insect control.
Co-occurring Orb Weaver (c) M. Whitson, some rights reserved (CC BY) · cc-by
Co-occurring Orb Weaver (c) Katja Schulz, some rights reserved (CC BY) · cc-by
Prey (c) Kimberly, some rights reserved (CC BY), uploaded by Kimberly · cc-by
Close Relative (c) Nora Jácome, some rights reserved (CC BY) · cc-by
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