Brazillian White Knee

Acanthoscurria geniculata

Typical adult female Chilean Rose Tarantula (Grammostola porteri) shown feeding on a locust

The Brazilian White Knee (Acanthoscurria geniculata) is a species native to areas in brazil, and are known for their large size and voracious appetite. Adult females of this species will regularly reach a leg-span of around nine inches, with males being smaller. This species also has very striking black and white colouration, and is generally regarded as very easy to care for, but caution should be used as this species tends to be more defensive and more likely to bite or flick than other beginner species. This is a slightly faster growing species, but females still have a lifespan of around fifteen to twenty years and the males around five to seven years.

This species is also a typical, mid-sized new world terrestrial species, and as such the tank design is very similar to that of other species, such as the Grammostola and Brachypelma species, but often requires a small increase in humidity, which can be achieved with occasional spraying.

This species can eat until they are very overweight, with an oncoming moult often being the only reason that they will stop eating, and as such food should be offered once every two weeks with one or two suitably sized prey items, otherwise the spider could become overweight. With this species handling is not encouraged, and will often lead to injury to either you or the spider.

Basic Care

Tank design for a typical new world, terrestrial tarantula

The care of this species is like that of the more commonly kept Grammostola and Brachypelma species, but due to their larger size they require slightly more floor space. The tank should be at least two to three times the diameter of the spider’s leg-span in either horizontal direction, with height not being important, although should be limited to reduce the risk of falling injuries. This species generally does well at room temperature, but may require an occasional spray to raise the humidity or overflowing the water bowl occasionally. The water bowl should be large enough that the spider can rest its mouthparts across the surface, meaning it should be around half to three quarters of the spider’s leg-span.

This species tends to eat voraciously, and will generally accept food even approaching a moult, and should generally be offered prey once every week or two, depending on the size. Suitable prey includes various commonly sold insects, such as locusts and crickets, and can be offered the occasional pinkie mouse or other small vertebrate, but this is not recommended due to the mess made in the enclosure, with this possibly leading to mould. Handling is not recommended unless necessary, and I recommend moving the spider using a plastic box placed over the spider with the lid being slid underneath.


  1. Schultz, S.A. & Schultz, M.J.(2009) Tarantula Keeper's Guide, 2nd Edition. Barrons Educational Series, USA.