Theraphosa stirmi

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Theraphosa stirmi

Theraphosa stirmi is a species of tarantula belonging to the family Theraphosidae.[1] It is known as the burgundy goliath bird eater.

Scientific classification

  • Kingdom: Animalia
  • Phylum: Arthropoda
  • Subphylum: Chelicerata
  • Class: Arachnida
  • Order: Araneae
  • Infraorder: Mygalomorphae
  • Family: Theraphosidae
  • Genus: Theraphosa
  • Species: T. stirmi
  • Binomial name: Theraphosa stirmi


Theraphosa stirmi Rudloff&Weinmann, 2010, also known as “Burgundy goliath birdeater”, is a remarkable bird spider due to its size from Guyana. Theraphosa stirmi is a look-alike from the same region as Theraphosa blondi, often wrongly being sold as Theraphosa blondi. Differences between both are hard to spot for the unexperienced eye.

Breedings are more successful and therefore Theraphosa stirmi is much cheaper than Theraphosa blondi. Inform yourself about the differences (below). Bird spiders of the Theraphosa-genus are the world’s biggest spiders.


Guyana has a tropical climate, with little seasonal temperature change. The annual rainfall (about 1,525 to 2,030 mm/about 60 to 80 in) on the coast occurs mainly from April to August and November to January. The savanna region receives some 1,525 mm (60 in) of rain annually, mainly from April to September. The climate of coastal Guyana is extremely mild for a low-lying tropical area because of the persistent trade winds blowing in off the Atlantic Ocean.


Because it was mid-summer and temps were high when I set this cage up, and the conditions inside were a bit more moist than I usually have, I decided to monitor it for a week or so before getting my spider. Twice, I added more ventilation after I noticed tiny mold spots. I wanted the humidity to be high enough to support the animal, but not so high as to foster mold, mildew, and other undesirable conditions. The combination of heat and humidity can easily create an overly stuffy and ultimately dangerous living environment for even moisture-loving Ts.

To keep conditions favorable, I usually wet down one side of the substrate once a week or so using a bottle I modified into a watering can. This allows me to simulate a downpour and adds more water than simply spraying. Because of the vermiculite, the water percolates down into the lower levels, keeping them damp while the top eventually dries out.


The spider will not hesitate to shed its urticating setae or start stridulating in an impressive threat pose. Urticating setae of Theraphosa stirmi are remarkably effective against mammals, especially in the eyes and/or inhalation. As the spider gets older, she’ll become calmer. During the day they’ll stay in their burrow. When kept properly, even at night you won’t notice Theraphosa stirmi out in the open. Most of the time she’ll stay at the entrance of her burrow.

Theraphosa stirmi images

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