Grammostola iheringi (Entre Rios Tarantula)

Grammostola iheringi (Entre Rios Tarantula)

The Entre Rios, or Grammostola iheringi, is a terrestrial tarantula from Brazil and Uruguay. Spiderlings hatch out with the same shiny black body and bold red abdomen as the adults, holding that signature contrast through every molt, creating a beautiful high contrast coloration similar to its cousin, the Black Yeti. This species only grows to about 7 inches in diagonal leg span, with a fast growth rate, and is debated as one of the largest species in the Grammostola genus. Like others in the genus, this species has a very long lifespan, with females reaching about 20 to 30 years while males live 3 to 5 years. This species is also very calm and forgiving for a species of its size, and one we recommend for anyone who wants an easier keeping experience despite its impressive presence. Grab this docile new world tarantula for sale today, with every size we carry listed below.

Why do hobbyists keep Grammostola iheringi?

• Stunning Coloration: A shiny black body paired with a bold red abdomen, a striking contrast that holds steady through every molt, sling to adult.
• Colorful Spiderlings: Even fresh spiderlings show off the same black and red coloration, nearly identical to its cousin the Black Yeti at this stage, with the two sharing very similar coloration through the juvenile stage before growing apart.
• Large Size: Debated as the largest species in the Grammostola genus, reaching about 7 inches at full leg span.
• Docile Temperament: Calm and easygoing for a species of its size, an engaging animal to keep on display.
• Great Beginner Species: This genus is known for a high success rate among keepers starting from a spiderling, forgiving of the small mistakes that come with learning, so starting at this size is a solid way to begin.
• Rare in the Hobby: Rarely available and quick to sell out whenever it is in stock.

How should Grammostola iheringi be kept?

• Adult Size: Hatches at around 0.5 to 0.75 inch and reaches about 7 inches at full leg span, one of the largest Grammostola species in the hobby.
• Enclosure: Provide roughly 3 to 4 times the leg span as footprint and 2 times the leg span as height, with substrate at least as deep as the leg span. Pick a size above for that tier's exact setup.
• Temperature: Keep between 65 to 75 degrees F.
• Humidity: Maintain a moisture gradient with a slightly damp lower layer and a drier surface, similar to a morning dew cycle in the wild. Good ventilation is critical.
• Water: A shallow textured water dish works well, something they can grip when climbing out.
• Diet: Crickets, roaches, and similar feeders sized to the carapace (head). Pick a size above for that tier's exact prey measurement.
• Temperament: Calm and easygoing for its size, a great pick for anyone who wants a docile, low-key display animal without giving up presence.

Which size should I choose?

• 0.75-1" Spiderling: your cheapest way to collect this species, already showing the black and red coloration it will carry into adulthood.
• 1.25-1.5" Spiderling: a well-started spiderling, past the size the species hatches at, growing quickly thanks to its fast growth rate.
• 2-2.5" Juvenile: past the delicate early stage, with the full black and red contrast already showing.
• 2.5" Female Juvenile: a confirmed female, no guesswork on the sex behind the multi-decade lifespan.

Are there any additional notes or considerations for Grammostola iheringi?

• Captive Bred: All tarantulas at Exotics Unlimited are captive bred.

Frequently asked questions about Grammostola iheringi

• Is the Entre Rios the same species as the Black Yeti? No. They are two different species in the same genus, Grammostola iheringi and Grammostola actaeon. Spiderlings of the two share very similar black and red coloration, which is why they're compared here, but they diverge as they mature.
• How big does the Entre Rios get? Adults reach about 7 inches in diagonal leg span, debated as one of the largest species in the Grammostola genus.
• Is the Entre Rios a good pick for a first larger tarantula? Yes. It stays calm and easygoing despite its size, making it an approachable way to keep an impressively large, striking Grammostola.

Looking for similar species?

• Browse our New World Tarantulas and Terrestrial Tarantulas collections to explore related care profiles and species groupings.