Poecilotheria formosa

🔤 Taxonomy

Poecilotheria formosa is the currently accepted scientific name. The species was described by Pocock in 1899, and Tarantupedia lists the type locality as Kadiampatti and Mullapuram in the Salem District Sheveroy Hills.

English common names used in the hobby:

• Salem ornamental tarantula

German common names used in the hobby:

• Schmuckvogelspinne aus Salem

📌 Description

Poecilotheria formosa is an arboreal Old World tarantula from India, known for its dark body, high-contrast patterning, and elegant posture. It is a sought-after ornamental species for keepers who appreciate slender arboreal spiders with bold markings.

Adult size is usually about 6-7 cm body length and about 18-20 cm legspan, with females typically heavier than mature males.

Like other Poecilotheria, it is fast, alert, and not suitable for routine handling.

It is best treated as a display species. Calm maintenance and reliable retreat options matter more than trying to keep the spider visible at all times.

☠️ Venom

Poecilotheria formosa should be treated as a medically significant tarantula. A bite can cause intense local pain, swelling and, in some cases, wider symptoms such as muscle pain, cramping, nausea, dizziness or prolonged discomfort.

Routine pet care does not use a species-specific antivenom for these bites. Avoid handling, work the enclosure so contact is unlikely, and seek medical advice after a serious bite, allergic reaction, breathing difficulty, spreading symptoms, or any bite involving a child or vulnerable person.

🌍 Distribution

Poecilotheria formosa is native to southern India. In the wild it is associated with dry to moderately humid forest and tree retreats in warm seasonal climates.

In captivity, that background points to:

• a secure vertical enclosure with cork bark or tree-bark retreats
• strong cross-ventilation with moderate humidity
• fresh water and occasional moisture without stale air
• minimal disturbance around the main retreat
• careful maintenance, because fast arboreal species can bolt quickly

🌡 Climate across the native range

Monthly climate normals from reviewed GBIF occurrence locations:

Weather data by Open-Meteo.com · CC BY 4.0 · Monthly normals calculated by Herpeton Academy from daily archive values.

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

⚖️ Legal status

Poecilotheria formosa 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. Local rules on import, sale, breeding, transport, exhibition, and documentary proof of legal origin may still apply, so retaining source paperwork is advisable.

🤌 Husbandry

Poecilotheria formosa should be housed alone in a secure arboreal setup.

Use smaller starter housing for slings so food and sheds can be monitored, then step up enclosure size as the animal gains size and confidence.

Stage management is different from terrestrial species. Slings and small juveniles should be kept in smaller, well-ventilated vertical containers where prey can be found and the retreat stays secure. Adults need taller, escape-proof enclosures with a dependable bark retreat and a clear maintenance plan, because large Poecilotheria are fast, defensive, and difficult to manage safely during rehousing.

The essentials are:

• Tall enclosure
• Cork bark retreat
• Strong cross-ventilation
• Water dish
• Minimal disturbance

An adult setup should prioritize vertical retreat security more than decorative complexity. This genus usually responds better to a predictable enclosure than to frequent rearrangement.

💡 Lighting

Use ambient room light for a predictable day-night cycle; bright basking lamps are unnecessary.

Strong display lighting is unnecessary and may increase hiding behavior.

🌡 Heating and temperature

Use moderate room warmth rather than intense heating:

• Daytime: around 24-28°C
• Night: slight drop acceptable

Stable moderate warmth is preferable to trying to maintain extreme heat all day.

💧 Humidity and water

Poecilotheria formosa does best with moderate humidity and strong ventilation. Fresh water should always be available.

The enclosure should never stay stale and wet for long.

Useful principles include:

• Fresh water always available
• Some moisture retention lower down or in one area
• Drying between heavier moisture inputs
• Good air exchange at all times

🌿 Enclosure and decoration

Use a vertical enclosure with cork bark, upright structure, and secure hiding space. Height and retreat quality matter more than substrate depth.

Avoid frequent rehousing or repeated disturbance.

Decoration should be simple enough that the spider can move cleanly between retreat points without repeated handling during maintenance.

🪳 Feeding

Poecilotheria formosa is insectivorous. Suitable prey includes:

• Crickets
• Roaches
• Locusts where available
• Mealworms only in moderation

Feeding pace should slow with age: every few days for slings, weekly or twice weekly for juveniles, and about every 7-14 days for most adults.

Uneaten prey should not be left to bother a spider in premolt. Overfeeding is unnecessary in adult arboreal tarantulas.

Feeding changes with age. Slings can eat smaller prey or prekilled pieces more often, but uneaten prey should come out quickly, especially around premolt. Adults need less frequent meals, and an oversized abdomen is a reason to slow down, not feed more.

🩺 Common problems

Common problems include stress, dehydration, poor ventilation, overly damp stagnant conditions, and falls in poorly designed enclosures.

Warning signs include lethargy, poor feeding response in a declining animal, and difficult molts.

Repeated frantic movement, refusal to settle, or persistent climbing around doors and vents often points to enclosure stress or maintenance disturbance.

📌 Conclusion

Poecilotheria formosa is an elegant arboreal ornamental tarantula best suited to keepers who can offer height, ventilation, and calm maintenance. Security and stable warm conditions are the essentials.

📚 Sources and further reading

• CITES Appendices, checked 2026-05-04
• EU wildlife trade regulations and annex references, checked April 2026
• GBIF species backbone and occurrence data for taxonomy and distribution context
• IUCN Red List and specialist husbandry references where applicable