The Australian redback spider is a highly toxic spider, mainly distributed in Australia, but also in New Zealand, Southeast Asia and Japan. The female spider is about 1cm long and has a black body with red or orange stripes and hourglass marks on her abdomen. The male spider is smaller and lighter in color. The venom contains a neurotoxin that can cause severe pain, swelling, and nausea after being bitten, but antivenom can be an effective treatment. It prefers to inhabit dark, dry environments, such as under rocks, firewood or outdoor furniture, and is nocturnal. Females live up to 2-3 years, males usually only 6-7 months.

The five-line slippery-tailed scorpion, also known as the Israeli golden scorpion or death scorpion, is a highly venomous scorpion that lives in North Africa and the Middle East. The body length is usually between 7 and 8cm, and the body color is yellowish brown or dark brown. The venom contains a strong neurotoxin that is potentially deadly to humans. The habitat is mostly dry desert areas, often digging caves under rocks or in sand dunes. Predators are mainly other insects and small invertebrates. Due to the strong toxicity of its venom, the five-line smooth-tailed scorpion is considered one of the most toxic species in the scorpion kingdom.

It is a type of spider with strong toxicity, belonging to the widow spider family. Known for its vibrant black body color and red belly spots, these spots are sometimes mistaken for the origin of the name 'Black Widow', but in reality, their names are more related to the behavior of females sometimes eating male partners after mating. Venom contains neurotoxins that can cause severe pain and a range of symptoms in humans, including muscle spasms, nausea, vomiting, and sweating. Mainly distributed in temperate regions around the world, commonly found in North America, Europe, and Asia. Usually active at night, it hides under rocks, in tree bark, or in cracks in buildings during the day.