Spiders in Sri Lanka
Sri Lanka's spider fauna is tropical, rich and much less dangerous than its reputation. The famous ornamental tarantulas of the genus Poecilotheria give a genuinely painful bite with cramping that can last days, but no Poecilotheria bite has ever been shown to kill a person. The only Sri Lankan spiders whose venom is medically significant are the widows, and they are small, shy and easily avoided.
On this page
- What spiders live in Sri Lanka?
- The ornamental tarantulas of Sri Lanka
- Which Sri Lankan spiders are actually dangerous?
- Where you actually meet them
- Spider season in Sri Lanka
- Look-alikes and species that are not here
- Common Spiders in Sri Lanka
- Biggest Spiders in Sri Lanka
- Most Venomous Spiders in Sri Lanka
- Less Venomous Spiders in Sri Lanka
- Living with spiders in Sri Lanka
- Frequently asked questions
What spiders live in Sri Lanka?
For an island the size of Ireland, Sri Lanka carries an extraordinary spider fauna. Dry zone thorn scrub, the wet zone rainforests of Sinharaja, montane cloud forest above Nuwara Eliya, paddy and coconut gardens each hold their own set, and several hundred species have been recorded, many of them found nowhere else.
Most of what a visitor actually sees is orb web. The giant wood spider, Nephila pilipes, slings its huge golden-sheened web across forest tracks and garden gaps; the grass cross spider Argiope catenulata and other Argiope species sit head-down in a zigzag-marked web over paddy and scrub; and colonies of the red tent spider build layered, non-sticky tent webs in shrubs. Close to houses the cast changes to jumping spiders on sunlit walls and small cobweb spiders in corners.
The ornamental tarantulas of Sri Lanka
Sri Lanka's signature spiders are the ornamental tarantulas of the genus Poecilotheria, known locally as divi makuluwa, the leopard spider. They are arboreal, live in tree hollows and behind loose bark, and several are endemic to the island: the Sri Lanka ornamental tarantula (P. fasciata), the fringed ornamental (P. ornata), the ivory ornamental (P. subfusca), the yellow-backed ornamental (P. smithi) and Poecilotheria rajaei, described in 2012 and immediately turned into a tabloid monster. The Rameshwaram ornamental (P. hanumavilasumica) belongs to the same group across the Palk Strait.
Their bite deserves respect but not panic. Envenomation causes immediate severe pain, swelling and, characteristically, muscle cramps in the bitten limb that come and go for several days, sometimes with sweating and headache. That is the honest picture: no death has ever been reliably attributed to a Poecilotheria bite anywhere in the world, and there is no antivenom because none is needed. Several are threatened by habitat loss and the pet trade, which is a far better reason to leave them alone than fear is.
Which Sri Lankan spiders are actually dangerous?
Only the widows. The brown widow, Latrodectus geometricus, is established across the tropics and turns up around Sri Lankan buildings, in wall cavities, under garden furniture, in stacked pots and in outdoor meter boxes. It is tan to dark brown with an orange hourglass, and its egg sac is the giveaway: a pale ball covered in silk spikes. Its bite is usually milder than other widows, but it is a true Latrodectus and can cause cramping pain, sweating and nausea. The redback, L. hasselti, is an Australian species that shipping has moved around Asian ports, and it produces the same syndrome more forcefully.
Everything else on the island is, in medical terms, a nuisance at worst. Tarantula bites hurt badly but are not dangerous. The red house spider, Nesticodes rufipes, is a small red-legged cobweb spider of window frames and verandas that bites only if crushed against skin. Huntsman spiders and the big orb weavers deliver nothing worse than a brief pinprick.
Bitten? Wash with soap and water, apply a cold pack and keep the limb still. Go to a hospital if cramping pain spreads away from the bite, or if sweating, vomiting or chest tightness follow, because those point to a widow bite and are treatable. Photograph the spider if you safely can. Never cut, burn or apply a tourniquet.
Where you actually meet them
Around the house
Sri Lankan buildings hold small, harmless residents: pantropical jumping spiders on sunlit walls, daddy-long-legs spiders in ceiling corners, the red house spider in window frames, and the odd huntsman flattened behind a mirror, where it hunts cockroaches. Our house spiders guide covers the indoor group.
Garden, paddy and estate
Outdoors the visible layer belongs to orb weavers. Giant wood spider webs span gaps between coconut palms; Argiope species hang in paddy margins; and the double-spotted spiny spider, with its hard shelled abdomen and two blunt spines, builds small orbs in hedges.
Forest and tree hollow
The ornamental tarantulas belong here — in cavities of old forest trees, in rubber and jack trees near villages, and occasionally behind a loose plank. They are shy, rarely leave shelter in daylight, and bolt rather than fight when a torch finds them.
Spider season in Sri Lanka
Sri Lanka has no winter to shut spiders down, so the calendar is set by rain rather than temperature. The southwest monsoon soaks the wet zone from May to September and the northeast monsoon covers the dry zone from December to February; in both cases the flush of large webs comes in the weeks after the rain, when insect numbers peak and orb weavers reach adult size.
Heavy rain also drives ground and wall spiders indoors, which is when most household encounters happen. Tarantulas are least visible in the wettest weeks and are usually found when people move old timber in the drier months.
Look-alikes and species that are not here
Three claims about Sri Lankan spiders need correcting. There is no recluse spider on the island: Loxosceles is not part of the Sri Lankan fauna, and the necrotic-wound stories that circulate are almost always ordinary bacterial infections. Nor is the hobo spider a Sri Lankan animal — it is a European funnel weaver introduced to the Pacific Northwest of North America, and it appears on old island lists purely by mistake.
The second confusion is size. Poecilotheria rajaei was reported worldwide as a tarantula the size of a human face; the real animal has a leg span of around fifteen centimetres, impressive but ordinary for a large arboreal tarantula, and its bite is not exceptional either. The third is the harvestman, the long-legged arachnid with one oval body and no waist, which is not a spider at all: no silk, no venom glands, no danger.
Common Spiders in Sri Lanka
- Red tent spider (Cyrtophora unicolor)
- Grass Cross Spider (Argiope catenulate)
- Asian Hermit Spider (Nephilengys malabarensis)
- Double spotted spiny spider (Thelacantha brevispina)
- Abandoned-web Orb-weaver (Parawixia dehaani)
Biggest Spiders in Sri Lanka
- Giant Golden Orb Weaver Spider (Nephila pilipes)
- Rameshwaram ornamental tarantula (Poecilotheria hanumavilasumica)
Most Venomous Spiders in Sri Lanka
Tarantulas
Funnel Weaver SpidersHobo (Eratigena agrestis)Identify the hobo spider (Eratigena agrestis): size, chevron abdomen, funnel web, where it lives, and why its bite is not considered necroti
TarantulasIvory Ornamental Tarantula (Poecilotheria subfusca)Ivory ornamental tarantula (Poecilotheria subfusca): cream and black starburst markings, its Sri Lankan hill range, and why its bite needs m
TarantulasRameshwaram Ornamental Tarantula (Poecilotheria hanumavilasumica)Rameshwaram ornamental tarantula (Poecilotheria hanumavilasumica): ID marks, its tiny island range, its critically endangered status and its
TarantulasYellow-backed Ornamental Tarantula (Poecilotheria smithi)Yellow-backed ornamental tarantula (Poecilotheria smithi): ID marks, its tiny Sri Lankan range, why its bite causes delayed cramps, and its 
TarantulasFringed Ornamental Tarantula (Poecilotheria ornata)Identify the fringed ornamental tarantula (Poecilotheria ornata): true size, leg fringes, Sri Lankan rainforest range, tree-hollow retreat a
TarantulasSri Lanka Ornamental Tarantula (Poecilotheria fasciata)Identify the Sri Lanka ornamental tarantula (Poecilotheria fasciata): size, bark camouflage, yellow leg bands, island range and why its biteLess Venomous Spiders in Sri Lanka
Orb Weavers
Cobweb Spiders/Tangle Web Spiders (Theridiidae)
Tarantulas
Cobweb SpidersRed House (Nesticodes rufipes)Identify the red house spider (Nesticodes rufipes): rusty red body, tangled indoor web, why it is mistaken for a widow, and what its bite ac
TarantulasPoecilotheria rajaeiIdentify Poecilotheria rajaei, the Sri Lankan ornamental tarantula found in 2009: real size, pink abdominal band, habitat and why its bite iLiving with spiders in Sri Lanka
Spiders are among the most useful animals in a Sri Lankan garden, taking mosquitoes, paddy pests and flies in quantities no spray matches. A few habits remove almost all risk of a bite.
- Wear gloves and closed shoes when you move firewood, coconut husks, stacked pots, bricks or old timber — that is where widows and tarantulas shelter.
- Shake out shoes, clothing and bedding left on a veranda or in an unused room.
- Check outdoor meter boxes, garden furniture undersides and the lips of stacked flowerpots for spiky white egg sacs before reaching in.
- Never handle an ornamental tarantula, and never try to collect one: most are legally protected and several are threatened.
- Move an indoor spider with a glass and card, not a slipper.
- Leave the big golden webs alone; they are seasonal and they work.
The island's fauna overlaps heavily with southern India, and to understand what those enormous garden webs are actually doing, read our guide to spider webs.
Frequently asked questions
Are there dangerous spiders in Sri Lanka?
Only the widows. The brown widow is established around buildings across the island and the redback has been carried to Asian ports by shipping; both can cause cramping pain, sweating and nausea that hospitals treat routinely. The famous ornamental tarantulas hurt badly but have never been shown to kill anyone.
Are Sri Lankan tarantulas deadly?
No. Poecilotheria bites cause immediate severe pain, swelling and muscle cramps in the bitten limb that can recur over several days, sometimes with sweating and headache. No death anywhere in the world has been reliably attributed to a Poecilotheria bite, and no antivenom exists because none has ever been needed.
What is the biggest spider in Sri Lanka?
The giant wood spider, Nephila pilipes, a golden orb weaver whose largest females reach a body length of about five centimetres and a leg span approaching twenty. Its web can span several metres between trees and has a distinct golden sheen in sunlight. Despite the size it is harmless to people.
Are there brown recluse spiders in Sri Lanka?
No. No recluse spider of the genus Loxosceles is part of the Sri Lankan fauna, so necrotic wounds blamed on spiders here are almost always something else, usually a bacterial skin infection. If a sore is spreading, hot or weeping, it needs a doctor rather than a spider identification.
What is the divi makuluwa?
It is the Sinhala name, meaning leopard spider, for the ornamental tarantulas of the genus Poecilotheria. They are large arboreal tarantulas with intricate grey, black and cream patterning and bold yellow or orange markings under the legs. Several species are endemic to Sri Lanka and live in hollows of old trees.
Is Poecilotheria rajaei really the size of a human face?
No. The species was described in 2012 and reported worldwide with that comparison, but its leg span is around fifteen centimetres, which is large for an arboreal tarantula and nothing extraordinary among tarantulas generally. Its venom is no more potent than that of the other ornamental species on the island.
Which spiders are most common inside Sri Lankan homes?
Pantropical jumping spiders on sunlit walls, daddy-long-legs spiders in ceiling corners, the small red house spider in window frames and door jambs, and huntsman spiders flattened behind furniture and mirrors. All of them are harmless, and the huntsman in particular is a highly effective cockroach hunter worth leaving alone.
Is the giant golden orb weaver dangerous?
No. Nephila pilipes has venom for its insect prey but is extremely reluctant to bite, and on the rare occasions it does the result is brief local pain and redness. It sits in the middle of its web and drops or flees when disturbed rather than defending it against something as large as a person.
How do you identify a red tent spider?
By the web rather than the spider. Cyrtophora unicolor builds a dense, three-dimensional, non-sticky sheet pulled into a tent shape and suspended in a scaffold of threads, often in colonies in shrubs. The spider itself is a stout, reddish to dark brown animal that sits under the centre of the tent.
Do hobo spiders live in Sri Lanka?
No. The hobo spider is a European funnel weaver that was accidentally introduced to the Pacific Northwest of North America, and it has no population in Sri Lanka or anywhere in South Asia. Its appearance on older Sri Lankan spider lists is a straightforward error rather than a real record.
Published December 2, 2023 · Last updated September 14, 2026