Psalmopoeus cambridgei Care Guide

The Trinidad Chevron Tarantula

Revision Date: March 2025

Introduction

Psalmopoeus cambridgei, commonly known as the Trinidad Chevron Tarantula, is a fast-moving, semi-arboreal species native to the tropical forests of Trinidad. This species is renowned for its striking chevron-patterned legs and deep olive-green coloration, making it a visually stunning addition to any collection. Unlike many New World species, P. cambridgei lacks urticating hairs and instead relies on speed and potent venom as its primary defenses. While not considered aggressive, this tarantula is known for its skittish nature and will not hesitate to bolt or throw up a threat posture if disturbed.

Due to its defensive nature, speed, and moderate venom potency, this species is recommended for intermediate to advanced keepers. With proper care, P. cambridgei is a rewarding and hardy species that grows quickly, thrives in a well-ventilated enclosure, and develops into a large, display-worthy tarantula.

Quick Species Snapshot

• Scientific Name: Psalmopoeus cambridgei

• Common Name: Trinidad Chevron Tarantula

• Type: Semi-Arboreal

• Category: New World (Lacks Urticating Hairs)

• Endemic Location: Trinidad

• Body Length: ~3.5” (9 cm)

• Diagonal Leg Span (DLS): ~6-7” (15-18 cm)

• Growth Rate: Fast

• Life Expectancy:

  • Females: Up to 12-15 years

  • Males: Around 3-4 years

• Recommended Experience Level: Intermediate to Advanced

• Venom Potency: Moderate (More potent than typical New World species but not considered medically significant)

Taxonomy & Research Update

Psalmopoeus cambridgei was first described by Pocock in 1895 and remains one of the most well-known members of the Psalmopoeus genus. Unlike most New World tarantulas, which primarily rely on urticating hairs for defense, P. cambridgei evolved a different strategy—using speed and a more potent venom to ward off threats. While not as medically significant as some Old World species, a bite from this tarantula can still cause localized pain, muscle cramping, and swelling.

Recent studies have shown that Psalmopoeus species play an important role in their ecosystems by controlling insect populations in their native rainforest habitats. As hobbyists continue breeding them in captivity, their availability in the trade has increased, reducing the need for wild-caught specimens.

What Makes Psalmopoeus cambridgei Special?

• Unique Chevron Patterning: The species gets its common name from the bold chevron-shaped markings on its legs, adding to its impressive visual appeal.

• Fast Growth Rate: Unlike some tarantulas that take years to mature, P. cambridgei reaches adulthood within 2-3 years.

• Skittish but Not Aggressive: While defensive when provoked, this species is more likely to retreat to its webbed hide than stand its ground.

• Semi-Arboreal Adaptability: It thrives in enclosures that allow both climbing and burrowing behavior.

Natural Habitat & Enclosure Setup

Psalmopoeus cambridgei is native to the tropical forests of Trinidad, where it experiences warm temperatures, moderate to high humidity, and dense vegetation. In the wild, this species takes refuge in tree hollows, under loose bark, and among dense foliage, constructing elaborate web tunnels. In captivity, replicating this natural setup will encourage natural behaviors and provide a secure, comfortable environment.

Housing & Substrate

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Spiderlings

• Enclosure Size: Treehouse Mini, Coffin Crib Mini, Treehouse Extra Small, Sling Crib by Tarantula Cribs

• Substrate: 1–2” Terra Aranea by The Bio Dude

• Decor: Vertical cork bark, foliage, sphagnum moss

• Water: Small dish or occasional misting

Juveniles

• Enclosure Size: Treehouse Switch Small, Small Treehouse, Coffin Crib Medium, Crib 360 - 8 inch Arboreal by Tarantula Cribs

• Substrate: 1–2” Terra Aranea by The Bio Dude

• Decor: Cork bark, secure hiding spots, artificial plants

• Water: Small water dish provided

Adults

• Enclosure Size: Treehouse Switch-XL2.0, Large Treehouse - Clear Back, Treehouse Switch - Large, Large Coffin Crib by Tarantula Cribs

• Substrate: 2–3” Terra Aranea by The Bio Dude

• Decor: Cork bark tubes, vertical branches, foliage

• Water: Larger water dish

Temperature & Humidity

• Ideal temperature range: 70–78°F (21–25°C)

• Humidity: Maintain 65–75% humidity by misting one side of the enclosure and keeping a full water dish. Ensure proper ventilation to prevent stagnant air and mold growth.

Feeding Schedule

Spiderlings

• Frequency:
  Feed twice a week.

• Prey:
  Offer small prey such as flightless fruit flies, confused flour beetles, or pre-killed tiny crickets/roach nymphs. Remove any uneaten prey after 24 hours. increase the size of the prey as the spider grows. Prekill any prey that is over 2/3 the size of the sling. For more detailed information on feeding spiderlings, watch this video: How To Feed Spiderlings & Scorplings (Baby Tarantulas & Scorpions)

• Post-Molt:
  Wait 24–48 hours after a molt before feeding. Ensure that the tarantula’s fangs are solid black and its exoskeleton is not soft or shiny.

Juveniles

• Frequency:
  Feed every 7–10 days.

• Prey:
  Provide 2–3 small to medium crickets or a medium Dubia roach.

• Feeding Guidelines:

  • If the abdomen is thinner than the widest part of the carapace, feed more prey more often.

  • If the abdomen is wider than the carapace, feed less prey, less often.
    This strategy helps prevent obesity, which can lead to molting complications or increase the risk of an abdomen rupture from even a small fall.

• Post-Molt:
  Wait 3–7 days after a molt before feeding, ensuring that the tarantula’s fangs are solid black and its exoskeleton is fully hardened.

Adults

• Frequency:
  Feed every 2–3 weeks (or as needed).

• Prey:
  Offer 4–5 large crickets or one large Dubia roach.

• Feeding Guidelines:

  • If the abdomen is thinner than the carapace’s widest part, increase feeding frequency.

  • If the abdomen is wider than the carapace, reduce feeding frequency.
    This is crucial to avoid obesity, which can interfere with proper molting or cause dangerous issues such as an abdomen rupture.

• Post-Molt:
  Wait 5–10 days after a molt before feeding, ensuring that the tarantula’s fangs are solid black and its exoskeleton is fully hardened.

Behavior & Temperament

Psalmopoeus cambridgei is a fast and skittish species but not outright aggressive. If startled, it will retreat to its webbed hide rather than stand its ground. That said, it can be defensive when cornered and will bite if necessary.

While not as reclusive as some arboreal species, they tend to create intricate web tunnels and can spend extended periods hidden. However, they often come out to hunt, especially at night.

Due to their speed and potent venom, handling is strongly discouraged.

Breeding Psalmopoeus cambridgei in Captivity

Psalmopoeus cambridgei, commonly known as the Trinidad Chevron Tarantula, is an arboreal species native to Trinidad. Recognized for its vibrant coloration and impressive speed, this species is both admired and approached with caution due to its defensive nature and potent venom.

Sexual Maturity & Pairing

• Male Maturity: Males typically reach maturity within 1–2 years, characterized by longer legs and the development of bulbous pedipalps for sperm transfer.

• Female Maturity: Females generally mature around 2–3 years, achieving a robust size indicative of reproductive readiness.

• Pre-Pairing Preparation: We should ensure the female is well-fed before introducing the male to minimize the risk of cannibalism. Providing an enclosure with ample vertical spaces and anchor points for webbing can facilitate a more natural interaction during pairing.

Mating Process

• Introduce the male into the female’s enclosure during the evening or nighttime when tarantulas are more active.

• The male will typically perform courtship behaviors, such as tapping or drumming, to signal his presence.

• If receptive, the female may respond similarly or remain still, allowing the male to approach and attempt copulation.

• After successful mating, promptly remove the male to prevent potential aggression from the female.

Egg Sac Production

• If fertilized, the female may produce an egg sac approximately 31–45 days after mating.

• Maintain temperatures around 75–80°F (24–27°C) with humidity levels between 60–70%, ensuring adequate ventilation to prevent mold growth.

• An egg sac can contain a substantial number of eggs, with reports indicating clutches ranging from 110 to 250 eggs.

Egg Sac Handling (Optional)

• Some breeders choose to remove the egg sac from the female after 30 days for artificial incubation.

• If left with the mother, spiderlings (slings) will typically emerge within 6–8 weeks and undergo their first molt to the second instar stage within 3–4 weeks thereafter.

Raising Spiderlings

• P. cambridgei spiderlings exhibit a fast growth rate and require stable humidity with proper ventilation.

• Provide enclosures with sufficient vertical space to accommodate their arboreal nature, including structures for climbing and web attachment.

• Feed them appropriately sized prey, such as pinhead crickets or flightless fruit flies, every 2–3 days to support healthy development.

Challenges & Considerations

• Temperament: P. cambridgei is known for its defensive nature and rapid movements. Caution is advised during maintenance to prevent escapes or accidental injury.

• Venom Potency: This species possesses potent venom, which can cause significant pain and muscle cramping. Handling should be avoided to minimize the risk of envenomation.

• Humidity and Ventilation: Maintaining proper humidity levels is crucial, as spiderlings are particularly susceptible to desiccation. Ensure enclosures are well-ventilated to prevent mold growth.

With their striking appearance and manageable care requirements, Psalmopoeus cambridgei has become a popular species among tarantula enthusiasts. Their fast growth rate and relatively high reproductive output make captive breeding essential to maintain healthy populations in the hobby. By focusing on these efforts, we can reduce the need for wild-caught specimens, ensuring the sustainability of this remarkable species for future generations.

Final Thoughts

Psalmopoeus cambridgei is a stunning semi-arboreal species that thrives in a well-set-up enclosure. With its vibrant chevron patterning, rapid growth rate, and strong feeding response, it is an excellent addition for intermediate and advanced keepers.

Compared to other Psalmopoeus species:

• Psalmopoeus irminia (Venezuelan Suntiger) has bolder black and orange striping, while P. cambridgei has a more subdued olive-green coloration with chevron markings.

• Psalmopoeus reduncus (Costa Rican Suntiger) is slightly smaller and has less dramatic chevron patterns.

• Psalmopoeus victori (Mexican Half & Half) has a more striking black-and-red coloration.

Additional Recommendations

For enclosures, check out Tarantula Cribs (code TTC10 for 10% off).
For substrate, use Terra Aranea by The Bio Dude.
For purchasing tarantulas, visit Spider Shoppe (code TTC10 for 10% off).