Xenesthis immanis (Colombian Lesserblack)

The Colombian Lesserblack is widely regarded as one of the most spectacular tarantulas in the world. This massive New World species is a true “showpiece,” combining incredible size with a metallic, iridescent sheen that has earned it legendary status among collectors.

Key Highlights

• Stunning Iridescence: Despite its “black” common name, this species is famous for the vibrant, starburst-like patterns of pink, purple, and violet that radiate from its cephalothorax. Under good lighting, it glows with a brilliant neon luster.

• Gigantic Proportions: This is one of the largest tarantulas in the hobby. Females can reach a staggering leg span of 20–23 cm (8–9 inches), making it a massive presence in any room.

• Fascinating Biology: In the wild, they are famous for an unusual mutualistic relationship with the Chiasmocleis ventrimaculata frog; the spider protects the frog from predators, while the frog eats ants that might harm the spider’s eggs.

• Bold Behavior: While they are New World and typically use urticating hairs as their first defense, they are known for their confident and aggressive feeding response. They are fast, skittish, and generally considered a “display-only” species.

Quick Care Stats