1. Black Widow Spider : Black widow spiders are one of the most famous and feared spiders in the world. They are shiny black with a red hourglass mark on their abdomen. Black widow spider venom contains latrotoxin, which causes symptoms such as muscle pain, nausea, difficulty breathing and convulsions. Although rarely fatal, a bite from a black widow spider still requires immediate medical attention. (Photo: National Geographic)
2. Redback Spider: Redback spiders, a close relative of the black widow, have a red mark on their back. This spider is common in Australia and has a powerful venom that can cause severe pain, nausea, fever and muscle spasms. Although rarely fatal, a bite from a redback spider still requires medical treatment. (Photo: ABC)
3. Brazilian Wandering Spider: The Brazilian wandering spider is known as one of the most dangerous spiders in the world. They are large in size and are commonly found in the rainforests of South America. (Photo: The Independent)
Their venom can cause symptoms such as severe pain, high blood pressure, nausea and in rare cases, death. (Photo: Spidapedia Wiki – Fandom)
4. Brown Recluse Spider: Brown Recluse Spiders are commonly found in the US, and their venom causes tissue necrosis. Their bite may not be painful at first, but after a few hours, the bite area can become red, swollen and develop a necrotic ulcer. This can lead to serious infections and even require surgery to remove dead tissue. (Photo: Insects in the City – Texas A&M University)
5. Sydney Funnel-Web Spider: The Sydney Funnel-Web Spider is one of the most venomous spiders in the world, common in the Sydney area of Australia. Their venom contains atraxotoxin, which causes rapid symptoms such as convulsions, nausea, difficulty breathing, and death if not treated promptly. However, thanks to the development of antivenom, the mortality rate from funnel-web spider bites has dropped significantly. (Photo: The Economist)
6. Mouse Spider: Mouse spiders are found in Australia and have venom similar to that of the Sydney funnel-web spider. Although their bites are not as common as those of funnel-web spiders, they still require immediate medical attention. Symptoms can include severe pain, swelling, and difficulty breathing. (Photo: Wikipedia)
7. Brown Widow Spider: Brown widow spiders are a relative of the black widow and have less dangerous venom. However, their bites can still cause symptoms such as pain, nausea, and muscle spasms. They are commonly found in tropical and subtropical regions around the world. (Photo: Center for Invasive Species Research)
