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Pterinochilus murinus: The Orange Baboon Tarantula

The Orange Baboon Tarantula, or Pterinochilus murinus, is a charming and fascinating species of tarantula. This animal originates from Africa and is known for its striking orange coloring, protective behavior and unusual habits. This species is of interest to archaeologists and enthusiasts, but due to its aggressive nature, experienced keepers are usually advised to handle it.

Taxonomy and Distribution

Pterinochilus murinus is a member of the Theraphosidae family and is native to Tanzania, Kenya, Zimbabwe, Angola and many other African countries. This species exhibits remarkable environmental adaptability, thriving in a variety of environments, including savannas, scrublands, and forests.

Pterinochilus Murinus Physical Characteristics

pterinochilus murinus

The bright orange color of the Orange Baboon Tarantula makes it easy to spot, although there may be some variations. Some examples are brown or soft grey; They are known as the “Black Tanzanian” type. The tarantula’s striking appearance is enhanced by the starburst pattern on its carapace. Adult tarantulas are classified as medium-sized tarantulas due to their typical leg span of 4 to 6 inches (10 to 15 cm). The Pterinochilus murinus, also known as the Orange Baboon Tarantula, is highly aggressive.

Behavior and Temperament

Pterinochilus murinus is renowned for its aggressive and defensive tendencies. When threatened, many other tarantula species prefer to flee, but the OBT is known to survive and be able to bite if provoked. Hobbyists give him nicknames such as “Orange Bitey Thing” or “Pterror” because of his protective attitude. Additionally, OBT is a prolific webber, producing large and complex webs within its framework. This activity mimics the tunnels and retreats that tarantulas build in the wild, giving them complex structures for hunting and defense. One of the most interesting aspects of their husbandry is the netting, which can cover the entire enclosure and is often dense.

Habitat and Enclosure Requirements

The habitat requirements of the Orange Baboon Tarantula must be carefully considered for successful conservation. The following points will help you design the perfect cage:

1. Enclosure Size: Adult OBTs can be kept in tanks holding between 10 and 20 gallons. Given their penchant for above-ground and net dwellings, vertical space is less important than floor space.

2. Substrate: Vermiculite, peat moss, and coconut coir make a great mix for substrate. The depth should be sufficient (at least 3-4 inches) to support digging activities.

3. Humidity and Temperature: OBT enjoys moderate humidity levels of 60–70% and temperatures of 75–85°F (24–29°C). It is important to have sufficient ventilation in the cage to stop mold growth.

4. Hidden Anchors and Webs: Giving tarantulas access to hidden places such as half logs or cork bark, as well as plants or branches, will make them more comfortable and encourage them to build webs.

5. Water: Even though tarantulas don’t always use it regularly, it’s still important to have and maintain a shallow, clean water dish.

Feeding and Diet

Pterinochilus murinus is a voracious eater, and is fed live insects such as mealworms, cockroaches, and crickets in captivity. Adult spiders can be fed once or twice a week, but younger spiders should be given smaller prey every few days. Remove uneaten prey to prevent stress or harm to the tarantula. The Pterinochilus murinus, also known as the Orange Baboon Tarantula, is highly aggressive.

Pterinochilus Murinus Handling and Safety

pterinochilus murinus

Handling Orange Baboon Tarantulas is often not recommended due to their aggressive temperament. Although tarantula bites are not usually dangerous to humans, they can cause severe pain, swelling, and other local symptoms. Additionally, dealing with stress can have a negative impact on the tarantula’s health. It is more appreciated and talked about when it is covered. The Pterinochilus murinus, also known as the Orange Baboon Tarantula, is highly aggressive.


Because of its vicious nature, Pterinochilus murinus is difficult to reproduce, although not impossible. Careful planning and a deep understanding of the species’ habits are essential to successful breeding:

1. Mating: Carefully bring the male into the female’s enclosure. It is important to be careful to avoid hostile interactions.

2.Mating: The female will lay eggs in a few weeks or months if the mating process is effective. Each egg sac contains 50-200 eggs.

3.Keeping Spiders: To avoid cannibalism, after the eggs hatch, it is best to place the spiders in a separate container.

Conservation and Ethical Considerations

Although Pterinochilus murinus is not yet on the endangered species list, ethical sourcing and breeding should be considered. The pet trade uses many wild-caught tarantulas, which can have a negative impact on local populations. Encouraging breeders to target captive-bred specimens contributes to conservation efforts by putting pressure on the market for wild-collected tarantulas.


For those who enjoy studying tarantulas, Pterinochilus murinus, the Orange Baboon Tarantula, is an interesting but difficult species. Among arachnids, it stands out for its bright coloration, intrinsic activity and defensive attitude. However, it is best suited to an experienced keeper who can provide the specialized care it requires due to its aggressive nature. OBTs can be a useful and eye-catching addition to a tarantula collection if properly housed, fed, and respected for their natural behavior.


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