Brazilian Redrump Tarantula Care
Species: Grammostola actaeon
Common Names: Brazilian Redrump Tarantula, Giant Redrump Tarantula
The Brazilian Redrump Tarantula (Grammostola actaeon) is a large, terrestrial species native to the grasslands and forest edges of Brazil and Paraguay. Known for its calm disposition, stocky body, and rich reddish tones, it’s a wonderful showcase of South American tarantula diversity.
While not as vividly colored as some tropical species, G. actaeon exudes a quiet elegance — its subtle metallic carapace and dark red abdomen make it one of the most visually pleasing “gentle giants” in the hobby.
This species is perfect for keepers who appreciate relaxed, low-maintenance spiders that are still impressive in size and presence.
Quick Facts
- Scientific Name: Grammostola actaeon
- Common Name: Brazilian Redrump Tarantula
- Origin: Brazil, Paraguay, Uruguay
- Type: Terrestrial (burrowing tendencies)
- Adult Size: 16–18 cm (6–7 inches) leg span
- Lifespan: Females 20–25 years; Males 5–7 years
- Temperament: Calm, slow-moving, occasionally shy
- Experience Level: Beginner to intermediate
Appearance
This tarantula’s beauty is understated yet striking:
- Carapace: Subtle metallic gray to dark bronze sheen
- Legs: Thick and velvety dark brown to black
- Abdomen: Covered in dense reddish or rust-colored hairs (hence “Redrump”)
Adults are large and imposing, with a broad stance and impressive girth. Under soft light, the red hairs shimmer beautifully, especially after a fresh molt.
Enclosure Setup
G. actaeon prefers a terrestrial environment that allows for shallow burrowing and plenty of floor space. It’s not overly active but does appreciate being able to dig and rearrange substrate.
Recommended enclosure sizes:
- Juveniles: 20 × 20 × 20 cm
- Adults: 40 × 30 × 30 cm (16 × 12 × 12 inches)
Setup essentials:
- Substrate depth: 10–15 cm (4–6 inches) of coco fiber, soil, or topsoil/sand mix
- Include a hide (cork bark or half log)
- Add a shallow water dish
- Maintain good ventilation
Keep the substrate slightly dry, with one corner lightly moistened if your room is very dry.
Temperature & Humidity
- Temperature: 22–27°C (72–81°F)
- Humidity: 60–70%
Provide a stable, moderately humid environment. Lightly moisten a small section of substrate occasionally, but avoid keeping the enclosure wet.
Behavior & Temperament
Like most Grammostola species, G. actaeon is docile, slow-moving, and generally tolerant of light maintenance. It may be shy at first, often retreating to its hide, but it typically becomes more visible as it acclimates.
Behavior highlights:
- Calm and rarely defensive
- May flick hairs if startled, but seldom bites
- Usually visible and relaxed during nighttime hours
Its calm demeanor and predictable habits make it a perfect “display tarantula” for those who enjoy watching their spider without worrying about sudden defensive outbursts.
Feeding
This species is a steady but not aggressive feeder.
Feeding schedule:
- Slings: Every 5–7 days
- Juveniles: Every 7–10 days
- Adults: Every 10–14 days
Diet suggestions:
- Crickets, dubia roaches, or locusts
- Mealworms or superworms (occasionally)
G. actaeon may fast before molting or during seasonal changes, which is normal for this genus.
Handling
G. actaeon is among the calmer Grammostola species and can sometimes be handled by experienced keepers, though handling should always be minimal and cautious.
Handling tips:
- Keep handling sessions brief
- Avoid startling movements
- Always handle close to a soft surface
Even calm tarantulas can bolt suddenly if spooked.
Molting
Molting is slow and steady, especially as the spider matures.
Pre-molt signs:
- Dull coloration
- Refusal to eat
- Lethargy or hiding
Allow 10–14 days post-molt before feeding again to ensure the fangs have hardened.
Common Health Issues
G. actaeon is hardy and easy to maintain, provided humidity is not too high.
Key things to watch for:
- Overly damp substrate → mold or mites
- Falls → heavy-bodied tarantulas are prone to injury from height
- Dehydration → always offer fresh water
With stable conditions, this species can easily live over two decades.
Breeding (Overview)
Captive breeding of G. actaeon is less common but possible.
- Males approach cautiously; females are generally receptive
- Egg sacs contain 200–300 spiderlings
- Spiderlings grow slowly but are robust
Due to its long lifespan and slow growth, breeding projects require patience — but they contribute greatly to reducing wild collection pressure.
Quick Care Summary
| Parameter | Ideal Range |
|---|---|
| Enclosure Type | Terrestrial |
| Temperature | 22–27°C (72–81°F) |
| Humidity | 60–70% |
| Substrate Depth | 10–15 cm (4–6 inches) |
| Feeding | Every 10–14 days |
| Temperament | Calm, shy |
| Handling | Gentle and minimal |
Final Thoughts
The Brazilian Redrump Tarantula (Grammostola actaeon) is a hidden gem of the Grammostola genus — calm, large, and beautifully understated. Its impressive size, deep red tones, and gentle nature make it a perfect choice for keepers who appreciate peaceful, long-lived species with real presence.
If you’re looking for a low-maintenance giant that embodies the best of New World temperament and resilience, G. actaeon is a top pick.
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