Brazilian Black Tarantula

Geographical Origin and Habitat: Native to the grasslands (pampas) and shrublands of southwestern Brazil and northern Uruguay. Unlike purely tropical tarantulas, they experience seasonal temperature fluctuations and are adapted to drier conditions.

Taxonomy and Genetics: Belongs to the Theraphosidae family. Highly prized and sought-after in the hobby due to its solid, jet-black coloration and docility. Wild exports are prohibited, making captive-bred specimens highly valuable.

Behavior and Habits: Known for a slow, gentle temperament and is often considered the most docile tarantula species. They rarely flick urticating hairs and prefer retreating to their hide rather than defending themselves. They do not web extensively, making them excellent display animals.

Morphology: A large terrestrial tarantula, females can reach a leg span of 16–18 cm. Following a molt, they display a rich, obsidian-black color that softens to charcoal-grey over time. Females are exceptionally long-lived, reaching up to 30 years in captivity, whereas males have a much shorter lifespan.

Terrarium Setup: Provide a terrestrial terrarium (minimum 40x30 cm base). The substrate should consist of a dry-to-semi-damp mixture of topsoil and sand, at least 15 cm deep to allow burrowing. Include a half-buried cork bark hide and a heavy water dish.

Lighting and Heating: No lighting is required. Keep at normal room temperatures of 22–25°C. Prevent winter temperatures from dropping below 16°C. Avoid high summer temperatures; they will retreat into their burrows to escape excessive heat.

Humidity and Hydration: Maintain moderate humidity between 55–60%. They dislike wet substrate; keep the bulk of the soil dry. A fresh water dish must always be available. Overflow the bowl slightly once a month to create a small damp patch.

Feeding and Supplementation: Growth rate is exceptionally slow. Feed slings pinhead crickets, and adults 1–2 large crickets or roaches per month. They are known for going on prolonged fasts (from 6 to 12 months) before molting, which is completely normal.

Compatibility: Strictly solitary. Keep housed individually. For breeding, introduce the male carefully to a well-fed female, and use a divider if the female displays aggressive posture.

Health and Common Diseases: Extremely hardy. The main risk is overwatering the enclosure, which can cause lung distress and respiratory issues. Fasting is normal; do not force feed or increase humidity if they stop eating.