Even though only 30 out of 43,000 species of spiders are known to be venomous, their bites might require urgent medical attention. Topping the list of the deadliest spiders in the world is Atrax robustus otherwise known as the Sydney funnel-web spider.
As per reports, the reason why this spider gets the top spot is that its venom can kill in a matter of 15 minutes: "This species is native to eastern Australia. The Sydney funnel-web spider is considered deadly because its venom kills within 15 minutes. A male Sydney funnel-web spider also has a more powerful venom than the female; the male is often found roaming alone while the female lives in colonies of around 100 spiders."
They could be black and brown in color and are known to grow between 0.4 to 2 inches in length. According to reports, they can be found in moist, forested areas and prefer making their homes in tree trunks, stumps, or the ground in a funnel-shaped silk web about 60 cm deep. They are carnivores who feed on frogs, lizards, snails, cockroaches, millipedes, beetles, and other small animals.
The venom of the Sydney funnel-web spider is made up of atracotoxins which are lethal to humans if left untreated. These are the symptoms that result from a bite:
- Twitching of the facial muscles
- Tingling around the tongue and mouth
- Excessive sweating
- Shortness of breath
- Accumulation of fluid in the lungs and brain in severe cases
Even though the Syndey funnel-web spider is a formidable creature with menacing fangs, it still makes for a tasty snack for other animals that prey on them such as the chicken, centipede, and the blue tongue lizard.