Brazilian whiteknee tarantula

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Brazilian whiteknee tarantula

The Brazilian whiteknee tarantula (Acanthoscurria geniculata) is a species of tarantula from Brazil that is commonly kept as a pet.

Acanthoscurria geniculata, also known as “Giant whiteknee”, “Brazilian whiteknee tarantula” and “Whitebanded tarantula”, is an astonising bird spider due to its coloration, pattern and behavior from Brazil. She furiously hunts down her prey, going straight for the kill. You’ll sometimes hear people talk about Acanthoscurria transamazonica, which is being used as a synonym for the same spider. Acanthoscurria geniculata is high on many favorite-lists. Beginners sometimes confuse her with Nhandu chromatus.

Scientific classification

  • Kingdom: Animalia
  • Phylum: Arthropoda
  • Subphylum: Chelicerata
  • Class: Arachnida
  • Order: Araneae
  • Infraorder: Mygalomorphae
  • Family: Theraphosidae
  • Genus: Acanthoscurria
  • Species: A. geniculata
  • Binomial name: Acanthoscurria geniculata
  • Growth rate: Fast.
  • Life expectancy: Females can become up to 20 years old. Males are given a shorter lifetime around 4 years.
  • Accessibility (1/beginner: 10/expert): 5.


Your tarantula will pretty much eat anything from insects to small lizards and mice. We would recommend a steady feeding of only large crickets, cockroaches and locusts. Ideally they should be only fed once a week . As always though they can eat small mice and lizards it is not recommended. The amount of calcium it consumes might end up hardening its exoskeleton which can make it harder for it to molt and in cases can cause a bad or wet molt.


A tropical wet climate characterizes much of northern Brazil, with abundant rainfall and little or no dry season. Temperatures average 25°C (77°F), with more significant temperature variations between night and day than between seasons. Rainfall averages about 2,200 mm a year. Over central Brazil rainfall is more seasonal, characteristic of a savanna climate.

Eighty percent of the rain falls in summer, and there are more seasonal variations in temperature. Here rainfall averages about 1,600 mm a year. In the interior Northeast, seasonal rainfall is even more extreme. The semiarid region receives less than 800 mm (30 in) of rain, which falls in a period of two or three months. In addition to its scarcity and seasonal nature, the rain occasionally fails completely, causing serious drought conditions.


Its body and legs is a deep black color, though occasionally the legs may be slightly lighter in coloration. This contrasts the bright white bands on its legs, which is generally considered to be the main reason for its subjective beauty. The males are smaller and less intensely colored. This is a larger species of tarantula than the norm, with the length of the body reaching up to 9 centimetres (3.5 in). These tarantulas are fast growing, usually taking around 3–4 years to reach a mature leg-span of 8.5 inches for females.


The Brazilian Whiteknee Tarantula is semi aggressive and should it get startled will easily assume a defensive position showing fangs. They do come equipped with urticating hairs which can be quite irritating.

At full grown size they pack a powerful bite with fangs that can easily be an inch in length which can easily cause severe damage should they pierce human flesh. Their venom is semi potent and a bite can surely cause muscle cramps, pain and swelling. We recommend minimum tampering with its enclosure as they do not like to be bothered much.

Brazilian whiteknee tarantula images

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