The Chilean Beauties: A Guide to Euathlus truculentus "Blue" & "Hermosa" for UK Keepers
The Wow Factor
If you are captivated by the calm nature of Chilean spiders but want something more "high-fashion" than a standard Rose Hair, the Euathlus truculentus colour forms are the ultimate prize. Often sold under the names Blue and Hermosa (Dusky Teal), these spiders are the hidden gems of the Andes. They trade the usual earthy tones for a sophisticated palette of metallic blues, teals, and deep purples, often accented by the "tiger" patterns typical of the Euathlus genus. For the UK keeper, these are "guinea pig" spiders in designer clothing—docile, slow-moving, and incredibly beautiful.
Size, Growth, and Longevity
The Euathlus truculentus is a medium sized terrestrial tarantula, typically reaching an adult diagonal leg span of 10cm to 12cm (4 to 5 inches). Like their cousins, they are the embodiment of patience, possessing an moderate to slow growth rate. It can take several years for a spiderling to transition from a tiny "brown speck" into a shimmering adult. However, this slow metabolism is the secret to their incredible lifespan; females can easily live for 20 to 25 years, making them one of the hardiest and most enduring investments in the UK hobby.
Temperament and Suitability
The temperament of E. truculentus is legendary: they are famously docile, inquisitive, and calm. The "Blue" and "Hermosa" forms are often described as being even more interactive than other tarantulas, frequently walking towards an open enclosure lid out of pure curiosity. As a new-world species, they possess urticating hairs but are notoriously reluctant to use them.
Because of their predictable behavior and small stature, they are perfect for beginners and advanced keepers alike. In the UK, they are highly valued as "stress-free" spiders. While the "Blue" form is becoming more common, the "Hermosa" remains a rare find, making it a prestigious addition for those who appreciate the subtle, dusky teal iridescence of Chilean high-altitude species.
Simplified Care
Replicating the rugged, mountainous terrain of Chile is straightforward. They require a terrestrial setup with 10cm to 12cm of dry-to-semi-moist substrate. While they are primarily surface-dwellers, they appreciate a cork bark hide and will occasionally "redecorate" their space with light webbing.
To thrive in the UK, they prefer a cooler, stable environment. Aim for temperatures between 20°C and 24°C—standard UK room temperature is usually perfect. They prefer a drier environment with a humidity level of 40% to 50%. Keep the substrate dry, but always provide a shallow water dish and occasionally overflow it to provide a small moist corner. They are steady, reliable eaters, though their slow growth means they do not require heavy feeding schedules.
Conclusion
The Euathlus truculentus (Blue and Hermosa) colour forms are a masterclass in South American elegance. Their metallic sheens, coupled with a "puppy-dog" personality, make them some of the most desirable new-world species for any collection. Whether you are drawn to the electric pop of the Blue Femur or the sophisticated teal of the Hermosa, these Chilean beauties prove that the best things truly do come to those who wait.
