Orange Starburst Baboon Tarantula (Pterinochilus murinus)

Among the tarantulas for sale at The Defiant Forest, The Orange Starburst Baboon Tarantula (Pterinochilus murinus), often called the OBT, is one of the most recognizable tarantulas in the hobby. Famous for its brilliant orange coloration and intricate starburst pattern across the abdomen, this African species is admired by collectors for its dramatic appearance and fascinating behavior.

Native to eastern Africa, the Orange Starburst Baboon Tarantula is a highly active and defensive species known for producing extensive webbing throughout its enclosure. Its bold personality and striking coloration make it a favorite among experienced tarantula keepers who appreciate Old World species.

Because of its speed and defensive nature, Pterinochilus murinus is generally recommended for experienced hobbyists rather than beginners.

Species Overview

Scientific Name: Pterinochilus murinus
Common Name: Orange Starburst Baboon Tarantula (OBT)
Type: Terrestrial / heavy webbing species
Origin: Eastern Africa (Angola, Kenya, Tanzania)
Adult Leg Span: 4–6 inches
Temperament: Defensive and extremely fast
Growth Rate: Moderate to fast
Lifespan: Females 12–15+ years, males shorter

Natural History

In the wild, Pterinochilus murinus inhabits dry savannahs and scrubland environments across eastern Africa. These tarantulas construct complex burrow systems beneath rocks, roots, and natural debris, lining the tunnels with thick layers of silk.

The Orange Starburst Baboon Tarantula is highly adapted to warm, arid environments. Its heavy webbing behavior allows it to sense vibrations from prey and predators while remaining hidden within its retreat.

Unlike many New World tarantulas, this species relies on speed and defensive behavior rather than urticating hairs for protection.

Appearance

The Orange Starburst Baboon Tarantula is famous for its vivid orange coloration and striking abdominal pattern.

Adults typically display:

• bright orange legs and body

• distinctive starburst pattern on the abdomen

• robust, thick-legged build

• intense coloration that becomes more vibrant after molting

The bright coloration and bold pattern make Pterinochilus murinus one of the most visually distinctive tarantulas in the hobby.

Temperament

Pterinochilus murinus has a reputation for being one of the more defensive tarantulas in captivity. When disturbed, it may display threat postures or retreat rapidly into its webbed burrow.

As an Old World tarantula, this species does not possess urticating hairs and may rely on defensive biting if heavily provoked. Because of its speed and defensive nature, the Orange Starburst Baboon Tarantula is best suited for keepers with some experience handling fast-moving tarantulas.

Enclosure Setup

The Orange Starburst Baboon Tarantula thrives in enclosures that allow for burrowing and heavy web construction.

Recommended enclosure features include:

• several inches of dry substrate

• cork bark or structure for webbing

• adequate ventilation

• a shallow water dish

This species will often fill much of its enclosure with dense silk webbing, creating a complex tunnel system where it spends most of its time.

Feeding

Like most tarantulas, Pterinochilus murinus feeds primarily on insects such as crickets, roaches, and other appropriately sized prey.

Juveniles may be fed once or twice per week, while adult tarantulas typically feed every 7–14 days depending on size.

This species is known for its aggressive feeding response, which can make feeding time particularly exciting to observe.

Molting and Growth

Tarantulas grow through a process called molting, where they shed their old exoskeleton and emerge larger. During premolt, the spider may refuse food and become less active.

After molting, the tarantula should be left undisturbed while its new exoskeleton and fangs harden.

The Orange Starburst Baboon Tarantula tends to grow at a moderate pace and may reach adult size within several years under proper conditions.

Why Keep the Orange Starburst Baboon Tarantula?

The Orange Starburst Baboon Tarantula (Pterinochilus murinus) is prized among tarantula enthusiasts for several reasons:

• brilliant orange coloration

• striking starburst abdominal pattern

• fascinating heavy webbing behavior

• bold personality typical of Old World tarantulas

For experienced keepers seeking a visually dramatic and highly active species, the OBT is a captivating addition to any tarantula collection.

Learn More About Tarantula Care

If you're new to keeping tarantulas, see our complete Tarantula Care Guide to learn about enclosure setup, feeding schedules, molting, and species selection.

You can also browse our full selection of Tarantulas for Sale to explore other remarkable tarantula species available at The Defiant Forest.