Fauna
Arachnid

Pampean Redhead Tarantula

Grammostola vachoni

Also known as Argentine Redhead Tarantula

Pampean Redhead Tarantulas construct deep silk-lined burrows beneath rocks and crevices across the windswept grasslands of central Argentina. Females spend most of their long lives near these protective retreats, ambush-hunting nocturnal insects and small vertebrates that stray too close. Males wander extensively during the humid breeding season in search of mates, facing high exposure to predators and extreme weather.

BurrowingSouth American
Pampean Redhead Tarantula reference
(c) Lucas Rubio, some rights reserved (CC BY), uploaded by Lucas Rubio · cc-by
—observations
—countries
—peak records
VulnerableConservation statusIUCN Red List categoriesLCNTVUENCREWEXVulnerableRed List categories, explained →
Key facts
Diet & preyCrickets, Beetles, Cockroaches
Predators
  • Pompilid Wasps
  • Birds of Prey
  • Small Mammals
ThreatsHabitat loss, agricultural expansion, illegal collection
HabitatsGrasslands, rocky outcrops, scrublands
Life spanFemales 15–20 years, males 5–7 years
Classification
  1. FamilyTheraphosidae
  2. SpeciesGrammostola vachoni
Range & activity
Range data is not available yet.
Safe observation
Interaction riskVery high
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is very high
Flicks irritating abdominal hairs and can deliver a mild bite; observe safely without handling.
Why it is dangerous
Possesses barbed abdominal urticating hairs that cause painful skin rash and eye irritation, alongside a mildly venomous bite.
How to recognize a risky encounter
Identified by a velvety dark body framed by conspicuous reddish-orange hairs on the abdomen and legs.
What to do
Maintain a respectful distance and avoid prodding burrows or harassing wandering individuals.
What to notice
Found under natural rock slabs in rocky grassland habitats within central Argentina.
Support conservation
Keep exact location coordinates private and leave natural rock structures completely undisturbed.
Responsible observation
  • Observation: Watch from a short distance with a flashlight during evening hours when individuals emerge near burrow entrances.
  • Handling Caution: Avoid touching or disturbing burrows, as contact causes urticating hairs to shed into the air.
Related species
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