Scorpions (scientific name: Scorpiones) are an order of arthropods, of the class Arachnids. They are distinguished from other arachnids by their pedipalps developed into pincers and by the venomous sting that they carry at the end of their abdomen. We know about 2,200 species nowadays. Popular interest in scorpions is based on their predatory reputation and the fact that 40 to 50 species have venom potentially fatal to humans. However, they play an important role in the dynamics of insect populations and biodiversity.

Centipedes are elongated segmented (metameric) creatures with one pair of legs per body segment. All centipedes are venomous and can inflict painful stings, injecting their venom through pincer-like appendages known as forcipules. Some species of centipedes can be hazardous to humans because of their bite. While a bite to an adult human is usually very painful and may cause severe swelling, chills, fever, and weakness, it is unlikely to be fatal. Bites can be dangerous to small children and those with allergies to bee stings. The venomous bite of larger centipedes can induce anaphylactic shock in such people.