Brazilian Black Tarantula — Hobby Form

Grammostola sp. “pulchra”

The familiar Brazilian Black of the hobby: a glossy jet-black, slow-growing terrestrial Grammostola with a generally calm temperament and an uncertain taxonomic identity.

Lifestyle: Terrestrial

Difficulty: Beginner

Adult Size: About 6–7 in (15–18 cm) DLS

Growth Rate: Slow

Temperature: 24–29°C (75–84°F)

Humidity: Moderate (good ventilation essential)

About This Species

The Brazilian Black has been maintained in captivity for decades under the name Grammostola pulchra and is instantly recognizable for its glossy jet-black appearance. Recent taxonomic work has complicated that identification, with true G. pulchra and the closely related G. quirogai now better defined. Here’s the important part: the provenance of many historical captive lines is poorly documented, so coloration alone cannot confirm their identity. ArachNeeds therefore treats this familiar captive population as the hobby form while retaining the name by which it is best known.

Natural History & Behavior

Distribution

Long-established captive hobby lineage; original wild locality and provenance remain uncertain

Habitat

Wild habitat cannot be assigned confidently to the hobby form because the original provenance of many captive lines is uncertain.

Defensive Behavior

Generally calm and slow to escalate, although individual temperament varies. When disturbed, a specimen may retreat, kick urticating setae, or adopt a defensive posture. Its reputation for being docile should never be treated as a guarantee of predictable behavior.

Webbing & Burrowing

A terrestrial species with a strong tendency to use secure retreats and excavate when given enough substrate. Juveniles may burrow extensively, while established adults often modify an existing hide and spend more time near the entrance.

Species Details

Temperament

Calm

Lifespan

Females commonly 20+ years; males considerably shorter-lived

Taxonomy

Animalia > Arthropoda > Arachnida > Araneae > Theraphosidae > Theraphosinae > Grammostola

Husbandry

Enclosure

Use a low, wide terrestrial enclosure with generous substrate depth and limited fall distance. Provide a secure hide and enough floor space for normal movement. Climbing height should remain limited because of the species’ heavy body.

Substrate

Provide deep, compactable substrate that can support excavation and a stable retreat. Keep most of the enclosure on the drier side while allowing some deeper substrate to retain moisture. Avoid keeping the entire enclosure continuously wet.

Feeding

Offer appropriately sized roaches, crickets, or other suitable feeder insects. Growth is slow and adults do not require aggressive feeding. Adjust feeding frequency to body condition and remove uneaten prey when premolt is suspected.

Water

Provide a clean water dish at all times. Occasional overflow can maintain a localized moisture gradient, but good ventilation and avoiding persistently saturated substrate are more important than maintaining a specific humidity number.

Molting

Premolt may involve prolonged fasting and reduced activity, especially in larger specimens. Stop feeding when premolt is suspected, remove live prey, keep fresh water available, and avoid disturbing the spider until the new exoskeleton and fangs have fully hardened.

Breeding & Reproduction

Pairing is generally deliberate, with mature males using tapping and vibration to announce their presence before approaching a receptive female. Aggression and male loss remain possible, so introductions should always be observed carefully. The important part is patience. This is a slow-growing Grammostola, and the interval between pairing and egg-sac production can be long. Brood size and timing vary considerably between females, making successful breeding more about stable conditions and female readiness than constant intervention.

Life Stage Comparison

Mature Male

Spiderling