Ranong Blue Earth Tiger Tarantula
Ornithoctoninae sp.
The Ranong Blue Earth Tiger Tarantula (Ornithoctoninae sp.) is one of the most visually striking Old World tarantulas to enter the hobby in recent years. Native to the tropical forests of southern Thailand, particularly the Ranong Province region, this species is known for its intense metallic blue coloration combined with the powerful build and lightning speed typical of Asian earth tiger tarantulas.
Collectors prize this tarantula for its deep cobalt and sapphire tones that shimmer across the legs and carapace under proper lighting. When mature, the coloration becomes even more dramatic, creating a vivid contrast against the dark forest substrate that mirrors its natural habitat.
Appearance
Juvenile Ranong Blue Earth Tigers often display subtle bluish hues that intensify with each molt. As the spider matures, the legs develop rich electric-blue coloration, while the carapace typically maintains darker tones that accentuate the iridescent sheen of the limbs.
Adults generally reach a leg span of approximately 5–6 inches, with females being heavier-bodied and longer-lived than males. When fully grown, a mature female becomes a spectacular display specimen for advanced keepers who appreciate the beauty and raw power of Old World tarantulas.
Natural Habitat
In the wild, Ornithoctoninae species inhabit humid tropical forest ecosystems where they construct deep burrows beneath leaf litter, roots, and decaying wood. The Ranong region receives heavy rainfall throughout much of the year, creating the warm, moisture-rich soil conditions that these spiders prefer.
This tarantula is primarily fossorial, meaning it spends most of its life inside a burrow. In captivity, providing deep substrate allows the spider to exhibit its natural digging behavior and establish a secure retreat.
Behavior and Temperament
Like many Asian tarantulas, the Ranong Blue Earth Tiger is extremely fast and defensive. Rather than relying on urticating hairs like New World species, Old World tarantulas depend on speed and potent venom for defense.
This species is not recommended for beginner keepers. When disturbed, it may display a defensive posture or retreat rapidly into its burrow. Experienced hobbyists who respect its capabilities will find it to be a fascinating and rewarding species to observe.
Husbandry Overview
Proper care for the Ranong Blue Earth Tiger centers on recreating its tropical forest environment.
Key Care Parameters
• Temperament: Defensive / fast-moving
• Type: Fossorial (burrowing)
• Adult Size: ~5–6 inch leg span
• Temperature: 72–80°F
• Humidity: Moderate to high
• Enclosure: Terrestrial setup with deep substrate for burrowing
Providing structured substrate, cork bark, and leaf litter allows the spider to construct stable burrows and feel secure within the enclosure.
Feeding
Ranong Blue Earth Tigers are enthusiastic feeders and readily accept a variety of appropriately sized prey items such as:
• Crickets
• Roaches
• Mealworms or superworms
Feeding once weekly for juveniles and every 10–14 days for adults generally keeps the spider in excellent condition.
Why Collectors Love This Species
The Ranong Blue Earth Tiger has rapidly gained popularity among tarantula enthusiasts for several reasons:
• Rare and locality-specific Asian species
• Intense electric blue coloration
• Classic earth tiger fossorial behavior
• Excellent display specimen once established in its burrow system
For experienced keepers seeking a visually stunning Old World tarantula with powerful presence, the Ranong Blue Earth Tiger (Ornithoctoninae sp.) is a truly exceptional addition to a serious collection.
