Poecilotheria ornata

🔤 Taxonomy

Poecilotheria ornata is the currently accepted scientific name. Use the full Latin name because common names are reused loosely in the ornamental tarantula trade.

English common names used in the hobby:

• fringed ornamental tarantula
• ornate tiger spider

📌 Description

Poecilotheria ornata is a fast arboreal Old World tarantula from Sri Lanka. It is kept for display, not handling, and the enclosure has to be designed around speed, medically significant venom, and reliable paperwork.

Adults are usually about 18-23 cm legspan. Females are heavier and long-lived; mature males become slimmer, restless, and short-lived after maturity.

This is an expert species. A calm individual is still capable of explosive movement, defensive threat posture, and a serious bite.

☠️ Venom

Poecilotheria bites should be treated as medically significant. Reported effects can include intense pain, swelling, muscle cramps, nausea, dizziness, and prolonged discomfort.

Do not handle this species. Use catch cups, long tools, a closed work area, and planned rehousing containers. Seek medical advice after serious, spreading, allergic, respiratory, or persistent symptoms.

🌍 Distribution

World Spider Catalog lists Poecilotheria ornata from Sri Lanka. Care should reflect humid lowland and forest-edge tree retreats in Sri Lanka.

In captivity this means a secure vertical retreat, cross-ventilation, clean water, and a moisture gradient that does not turn the enclosure into a sealed wet box.

🌡 Climate across the native range

Monthly climate normals from reviewed GBIF occurrence locations:

Weather data by WorldClim v2.1 · Monthly normals queried by Herpeton Academy from raster values; relative humidity is derived from vapor pressure and mean temperature.

Location references use GBIF.org occurrence data where available; original occurrence records retain their source dataset licenses.

⚖️ Legal status

Poecilotheria ornata is covered by the CITES Appendix II listing for Poecilotheria spp. In the EU wildlife trade system, Poecilotheria tarantulas are treated under Annex B rules. The species is not relevant to the Bern Convention because it is not native to Europe. In the United States, Poecilotheria ornata is also listed as Endangered under the Endangered Species Act, so interstate commerce and transfers may need specific legal review.

Keep purchase invoices, breeder details, import or transfer paperwork where relevant, and records that connect the animal to a lawful source. Local rules on ownership, import, sale, transport, exhibition, breeding, and proof of legal origin may still apply.

🤌 Husbandry

Keep Poecilotheria ornata alone except for a controlled breeding introduction.

Spiderlings can start in small secure arboreal containers with bark and ventilation. Adults need a vertical enclosure around 35 x 30 x 50 cm or larger, filled with usable cork, bark, and anchor points.

Useful adult priorities:

• escape-proof vertical enclosure
• cork tube or vertical bark slab
• strong cross-ventilation
• water dish or reliable water access
• door layout that blocks sudden bolting

Because P. ornata is among the largest members of the genus, the adult retreat and door arrangement must be generous without creating an open flight path. Position the water dish where it can be lifted with long tongs, angle the cork away from the service gap, and leave enough covered room for the spider to turn without emerging. Perform major maintenance with the whole enclosure inside a larger clear tub. Prepare a catch cup, rigid card, second secure container, and assistance before opening it.

Spiderlings often stay close to the substrate and may excavate below bark. Start them with 3-5 cm of shape-holding substrate, a diagonal cork strip, and ventilation holes too small for the spider. Juveniles can be moved into progressively taller containers only when water access and feeding become cramped. Avoid rehousing just for display: every transfer is a high-risk event, and a large P. ornata can cover the working area faster than a keeper can react.

Do not test disposition by touching the spider. If it appears during maintenance, pause and let it regain cover. During a rehouse, place old and new containers inside the work tub, line up their retreats, and guide from behind with a long soft brush. Never use bare hands to stop or redirect a bolt.

💡 Lighting

Normal room lighting is enough. UVB and hot basking lamps are unnecessary.

Use indirect display light only. Bright heat above the retreat can dry the upper webbing and force the spider into exposed movement.

🌡 Heating and temperature

Aim for about 22-27°C by day, with nights around 20-23°C. Avoid a hot basking spot.

If extra heat is needed, warm the room or one side gently under thermostat control. The spider must be able to leave the warmest area without leaving its retreat.

💧 Humidity and water

Aim for about 70-85% as a ventilated gradient. Keep water available and maintain some moisture reserve without keeping the enclosure sealed or wet.

Good airflow matters as much as humidity. Condensation, mold, and a sour smell mean moisture is outpacing ventilation.

Humidity should be created as a gradient, not a uniformly wet interior. Overflow a small part of the water dish or moisten one lower corner, then allow the bark and upper surfaces to dry. Read temperature and humidity near the occupied retreat. Constant spraying can provoke exposed movement and does not replace a clean drinking dish.

🌿 Enclosure and decoration

Use cork tubes, vertical bark slabs, branches, and foliage to create private routes from floor to top. The retreat should let the tarantula disappear completely.

Avoid wide mesh, loose heavy decor, large door gaps, and layouts where the spider sits directly on the opening path.

🪳 Feeding

Feed roaches, crickets, locusts where legal, and occasional soft larvae. Adults usually do well with suitable prey every 7-14 days.

Offer prey near the retreat and remove uneaten insects before molts. Do not use vertebrate prey.

Use abdomen condition and molt stage to set portions. Spiderlings may accept small prey once or twice weekly, while a large adult can maintain good condition on one suitable meal every 10-14 days. Refusal, retreat sealing, reduced movement, and darkening coloration commonly precede a molt. Remove feeders and wait until the new fangs are fully dark—often a week or longer in a large adult—before offering food.

🩺 Common problems

Common problems include escape during water changes, stale wet air, dehydration, stuck molts, fall injuries, overfeeding, and rushed rehousing.

Most incidents happen during routine access. Design the enclosure so water, prey, and maintenance can be managed without chasing the spider.

A spider on its back is usually molting; do not right it or disturb the enclosure. Persistent condensation, a foul substrate odor, mites gathering around the mouth, a shriveled abdomen despite available water, fall injury, leaking hemolymph, or limbs trapped after a molt all need attention. Correct water, ventilation, or temperature faults promptly, but seek an arachnid-capable exotics veterinarian for evident injury, severe weakness, or a failed molt rather than trying unverified medication.

After any bite, secure the animal first without risking another exposure, wash the site, and obtain medical advice. Provide the scientific name and time of the bite. Do not cut, suction, freeze, or tourniquet the limb. Systemic pain and cramping can be delayed, so new symptoms over the following hours still matter.

📌 Conclusion

Poecilotheria ornata suits experienced keepers who can manage a secure arboreal setup, conservation paperwork, and no-contact maintenance. Buy only from traceable legal sources.

📚 Sources and further reading

• CITES Checklist and Appendices - legal status checked on 2026-06-03
• EU wildlife trade regulations - legal status checked on 2026-06-03
• Bern Convention appendices
• GBIF species backbone entry for Poecilotheria ornata
• World Spider Catalog species entry
• Tom’s Big Spiders: Poecilotheria husbandry notes
• Clinico-epidemiology of Poecilotheria bites in Sri Lanka
• U.S. Fish and Wildlife Service species profile
• Federal Register ESA final rule for Sri Lankan Poecilotheria