Indian Ornamental Tarantula (Poecilotheria regalis)
The Indian ornamental tarantula is an arboreal Old World tarantula from the deciduous forests of peninsular India, patterned in grey, cream and black like lichen on bark and flashing bright yellow bands on the undersides of its legs. It is fast, it has no urticating hairs to throw, and it is one of the very few tarantulas whose venom is genuinely medically significant.
By Dr Richard J. Pearce (PhD)Published May 25, 2022Updated September 13, 2026✓ Reviewed by Dr. James Watuwa
In this guide
- Physical description and identification
- Where the Indian ornamental tarantula lives
- Is the Indian ornamental tarantula venomous?
- Can Indian ornamental tarantulas bite?
- Ecological importance and behavior of the Indian ornamental tarantula
- Similar tarantulas and how to tell them apart
- Quick facts
- Did you know?
- Frequently asked questions
Physical description and identification
Poecilotheria regalis is one of about fifteen species in Poecilotheria, the ornamental or tiger tarantulas of India and Sri Lanka. They are Old World members of the family Theraphosidae, built for bark rather than burrows: a flattened body, long legs held out sideways, and dense pads of adhesive hairs on the feet that let a heavy spider sprint up a vertical trunk.
The first thing to correct is the size. Many pages give "7–8 cm" as the leg span; that figure is the body length. A mature female spans 150–200 mm (6–8 in) across the legs — the width of an adult hand.
Adults
- Size: females 50–70 mm in body length with a 150–200 mm leg span; males smaller in the body, typically 35–45 mm, but longer and thinner in the leg.
- Colour and pattern: a grey to greyish-white carapace with a dark branching central figure, an abdomen carrying a pale leaf-shaped folium outlined in black, and legs banded in cream, grey and black. Against lichen-covered bark the effect is near-perfect disruptive camouflage.
- The warning flash: the undersides of the first two pairs of legs carry bright yellow patches bordered in black, hidden at rest and exposed when the spider rears — an aposematic signal and a reliable genus-level identifier.
- Eyes: eight small eyes crowded on a raised tubercle, as in all mygalomorphs. Vision contributes little; the spider hunts by vibration.
- No urticating hairs. This separates every Old World tarantula from New World species such as Brachypelma, and it is why Poecilotheria relies on flight, display and biting instead. The spider can also stridulate, producing an audible hiss.
- Sexual dimorphism: mature males are slimmer, longer-legged and carry swollen palpal bulbs. Before maturity the only certain method is examining a shed skin for the female's spermathecae.
Eggs and the egg sac
The female builds a pale silk sac deep inside her retreat and fills it with cream to orange-tinted eggs, commonly a hundred or more. She guards it inside the tube, and the spiderlings emerge after roughly six to eight weeks.
Spiderlings
Newly emerged spiderlings are a plain orange-tan and develop the adult grey pattern only over several moults. They are fast growers by tarantula standards: males may mature in around eighteen months to two years, females in two to three.
The retreat and hunting
This spider builds no snare. It constructs an asymmetric funnel or tube of silk inside a hollow trunk or a deep bark fissure, with a wide silk apron around the entrance and lines running out over the bark. It sits inside with its front legs on those lines, and when a moth or cockroach crosses them it explodes out, bites, and drags the prey back in. See our guide to spider webs.
Where the Indian ornamental tarantula lives
The species is Indian, and its range is wider than the "south-eastern India" given in many accounts. Confirmed populations occur across central and southern peninsular India, including Andhra Pradesh, Telangana, Karnataka, Tamil Nadu, Kerala, Maharashtra, Madhya Pradesh, Odisha and Goa. Old records from Sri Lanka are generally treated as misidentifications; the Sri Lankan ornamentals are separate species, among them the Sri Lanka ornamental and the fringed ornamental.
Its habitat is mature tropical dry and moist deciduous forest, where it depends absolutely on large old trees with natural cavities — the same resource hornbills and owls need, and the first thing logging removes. Because the requirement is a hollow rather than a forest, the species persists in wooded temple groves, plantations and village trees, and turns up occasionally in the roof beams of old buildings. Several spiders may occupy different hollows in one tree, and communal tolerance among juveniles has been reported, which is unusual for a tarantula. Habitat loss is the main pressure, compounded by illegal collection for export.
Is the Indian ornamental tarantula venomous?
Yes, and unlike most tarantulas this one matters medically. Poecilotheria venom is the best-documented of any theraphosid genus for serious human effects, and clinical reviews of verified bites have concluded that the genus is a genuinely underestimated spider of medical importance — a rare statement to make about a tarantula, and one that should be taken at face value.
The effects point to an action on neuromuscular function. Bites produce local pain out of proportion to the small wound, followed after twenty minutes to several hours by severe cramping muscle spasms — characteristically in a limb other than the one bitten, and often in the chest, back or jaw. Reported accompanying effects include profuse sweating, fever-like malaise, headache, palpitations and vomiting. The cramps are the defining feature: they can recur in waves for several days, and lingering weakness has been described for weeks afterwards.
No death has ever been recorded from a Poecilotheria bite and no antivenom exists. The species has no urticating hairs, so the venom is the whole of the risk — and the reason experienced keepers treat these tarantulas as strictly hands-off animals.
Can Indian ornamental tarantulas bite?
They can, and far more readily than the calm New World species people picture when they hear the word tarantula. Describing this spider as placid, as some older accounts do, is misleading. Its preference is to bolt into its retreat, but it is nervous, extremely fast and prone to a defensive strike when cornered or grabbed. Threat display comes first: the front legs rear straight up, the yellow flashes are exposed and the spider may hiss audibly.
If you are bitten: wash the site with soap and water and apply a cold pack. Do not cut, suck or apply a tourniquet, and do not wait to see whether cramps develop — seek medical care promptly and tell the clinician the spider is a Poecilotheria, because the delayed cramping syndrome is unfamiliar to most emergency departments and is easily misread. Treatment is supportive: strong analgesia, muscle relaxants such as benzodiazepines for the spasms, fluids and observation. Symptoms resolve without lasting harm, but admission is sometimes needed.
Old World or New World? If a threatened tarantula turns its back and kicks at its own abdomen, it is a New World species defending itself with urticating hairs, and the bite is usually trivial. If it wheels round to face you, rears with the front legs vertical, shows coloured patches on the leg undersides and hisses, it is an Old World species like this one — no hairs, but a bite worth a hospital visit. The same rule covers the African baboon spiders such as the king baboon.
Ecological importance and behavior of the Indian ornamental tarantula
This is an arboreal ambush predator that spends the day pressed flat inside its silk tube and takes up position at the entrance after dark. Prey is detected entirely by vibration on the lines radiating over the bark, and the strike is among the fastest in the family — out, bitten and back in well under a second.
Diet: crickets, grasshoppers, moths, beetles, cockroaches and cicadas make up the bulk. Large individuals occasionally take small vertebrates such as geckos and tree frogs, and predation on small bats has been documented for large arboreal tarantulas generally.
Natural predators: tree-climbing snakes, monitor lizards, civets and macaques raid hollows; hornbills, owls and drongos take exposed spiders; and parasitoid wasps attack both adults and egg sacs. Wandering mature males are the most vulnerable stage.
Seasonal behaviour: activity peaks in the warm, humid months. Mature males abandon their hollows to search for females, drumming on the silk at a female's entrance before going in, and rarely survive long after. Females may hold one hollow for years and live eleven to twelve, against three to five for males.
Relationship with humans: wild encounters are uncommon and almost always end with the spider vanishing into a crevice. The real interaction is commercial: this is one of the most widely kept Old World tarantulas in the world, and while captive breeding supplies most of that demand, illegal export from India continues and helped drive the 2019 CITES listing. Near villages the spiders are sometimes killed on sight, on the strength of a reputation exaggerated in one direction — no deaths — and understated in the other.
Similar tarantulas and how to tell them apart
| Tarantula | How it differs from the Indian ornamental |
|---|---|
| Slate-red ornamental (P. rufilata) | The largest of the genus and unmistakably olive-green rather than grey, with a reddish flush on the leg hairs. Restricted to the southern Western Ghats. |
| Fringed ornamental (P. ornata) | A Sri Lankan endemic, larger, darker and browner, with reddish-brown leg fringes and a violet or greenish sheen on the carapace. |
| Gooty sapphire (P. metallica) | Impossible to confuse once mature: brilliant metallic blue. Known from a single tiny forest patch in Andhra Pradesh and critically endangered. |
| Pink toe (Avicularia avicularia) | The New World equivalent in lifestyle — arboreal, silk-tube dwelling — but far calmer, equipped with urticating hairs, and with venom of no medical consequence. |
Quick facts
| Other names | Indian ornamental tree spider, regal parachute spider. |
|---|---|
| Scientific name | Poecilotheria regalis Pocock, 1899; family Theraphosidae. |
| Size | Body 50–70 mm in females, 35–45 mm in males; leg span 150–200 mm. |
| Distribution | Central and southern peninsular India, from Maharashtra and Madhya Pradesh south to Kerala and Tamil Nadu. |
| Habitat | Hollows and deep bark fissures in large old trees in deciduous forest, plantations and temple groves. |
| Diet | Crickets, grasshoppers, moths, beetles, cockroaches and cicadas; occasionally geckos, tree frogs and small bats. |
| Lifespan | Females 11–12 years; males 3–5 years. |
| Predators | Arboreal snakes, monitor lizards, civets, hornbills, owls and parasitoid wasps. |
| Venom | Medically significant — severe delayed muscle cramps. No deaths recorded; no antivenom. |
| Conservation | On CITES Appendix II since 2019; threatened chiefly by loss of large hollow-bearing trees. |
Did you know?
- The genus name joins the Greek poikilos, spotted or dappled, to therion, wild beast; the species name regalis is Latin for royal. Reginald Innes Pocock described the species in 1899.
- "Parachute spider", the common Indian name for the genus, has nothing to do with gliding: there is no evidence that Poecilotheria can steer a fall.
- This is one of very few tarantula genera in which several individuals tolerate one another, with juveniles sometimes sharing a hollow rather than cannibalising each other.
In summary, the Indian ornamental tarantula is a large, beautifully camouflaged arboreal spider that deserves respect rather than fear. It will not chase anyone, but it is fast, it cannot throw hairs, and its bite causes cramping severe enough to put people in hospital.
Frequently asked questions about the indian ornamental tarantula
How do you identify an Indian ornamental tarantula?
Look for a large arboreal tarantula with a grey to greyish-white carapace marked by a dark branching figure, a pale leaf-shaped pattern on the abdomen, and legs banded in cream, grey and black. Adult females span 15 to 20 cm across the legs. Bright yellow patches on the underside of the front legs appear only in threat posture.
How big does a Poecilotheria regalis get?
A mature female measures about 50 to 70 mm in body length with a leg span of 150 to 200 mm, roughly the width of an adult hand. Males are smaller in the body, around 35 to 45 mm, but have longer, thinner legs. Figures of 7 to 8 cm quoted online refer to body length, not leg span.
Is the bite of an Indian ornamental tarantula dangerous?
It is medically significant. Bites cause intense local pain followed, after twenty minutes to several hours, by severe muscle cramps that often appear in a limb far from the bite, along with sweating, malaise and palpitations. Symptoms can last days. No deaths have been recorded and no antivenom exists, but medical care should be sought promptly.
Do Indian ornamental tarantulas have urticating hairs?
No. They are Old World tarantulas and, like every Asian and African species, they lack the barbed abdominal hairs that New World tarantulas kick at attackers. Their defence is speed, a dramatic rearing threat display with hissing, and a bite. The absence of urticating hairs is the quickest way to place a tarantula geographically.
Are Indian ornamental tarantulas aggressive?
They are defensive rather than aggressive. Their first response to disturbance is always to run into a crevice, and they do not pursue people. But they are nervous and very fast, and a cornered or grabbed spider bites readily. Calling the species placid, as some older accounts do, gives a false sense of safety.
What kind of web does an Indian ornamental tarantula build?
It builds an asymmetric funnel or tube of silk inside a hollow trunk, a woodpecker hole or a deep bark fissure, with a broad apron of silk and signal lines running out over the bark. The web does not trap prey; it transmits vibration, and the spider rushes out to seize whatever crosses the lines.
Where do Indian ornamental tarantulas live?
Across central and southern peninsular India, including Andhra Pradesh, Telangana, Karnataka, Tamil Nadu, Kerala, Maharashtra, Madhya Pradesh, Odisha and Goa. They need hollows in large old trees, so they occur in deciduous forest, plantations, temple groves and village trees. Sri Lankan ornamental tarantulas are separate species.
What do Indian ornamental tarantulas eat?
Mainly large insects: crickets, grasshoppers, moths, beetles, cockroaches and cicadas, ambushed at the entrance of the silk retreat after dark. Large females occasionally take small vertebrates such as geckos, tree frogs and even small bats. Prey is bitten, carried back inside and digested externally before the fluid is drawn up.
How can you tell a male from a female Poecilotheria regalis?
Mature males are slimmer with proportionally longer legs, carry swollen bulbs on the pedipalps, and often show a browner, higher-contrast pattern than females. Females stay bulkier in the abdomen. Before maturity the reliable method is checking a shed skin under magnification for the female's internal spermathecae.
Are Indian ornamental tarantulas protected?
Yes. Every species of Poecilotheria was listed on CITES Appendix II in 2019, so international trade requires permits. The main threat is not collection alone but the loss of large old trees with hollows, since the spider cannot live without such cavities. Indian wildlife law also restricts export of native fauna.
References
- World Spider Catalog (2026). Poecilotheria regalis Pocock, 1899. Natural History Museum Bern. wsc.nmbe.ch/spec-data/44452/taxon
