Theraphosa blondi, commonly known as the Goliath birdeater, is the largest spider in the world by mass. Native to the rainforests of northern South America (including Brazil, Guyana, and Venezuela), this terrestrial tarantula is famous for its massive size and defensive capabilities. 
 
Key Characteristics
Size: It can reach a leg span of up to 28–30 cm (11–12 inches)—roughly the size of a dinner plate—and weigh up to 175 grams (6.2 oz).
Diet: Despite its name, it rarely eats birds. It primarily hunts insects and small vertebrates like frogs, lizards, and rodents.
Defense Mechanisms:
Urticating Hairs: It can flick extremely irritating barbed hairs from its abdomen that cause severe skin and respiratory irritation.
Stridulation: When threatened, it produces a loud hissing sound by rubbing its legs together.
Fangs: It possesses massive fangs (up to 2 cm) capable of delivering a painful, though not medically significant to humans, bite.
Lifespan: Females can live between 15 and 25 years, while males typically live only 3 to 6 years. 
 
Captivity & Care
While popular in the hobby, T. blondi is recommended only for advanced keepers due to its specific needs and defensive nature. 
 
Environment: They require high humidity (80–90%) and deep, moist substrate for burrowing.
Enclosure: A large horizontal tank is essential. Because they are heavy-bodied, they should not have enough vertical space to climb and fall, as a fall can be fatal. 
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