The Order Araneae comprises all spiders, which are air-breathing arthropods belonging to the class Arachnida. Spiders are characterized by two main body segments (cephalothorax and abdomen), eight legs, and chelicerae with venomous fangs used to capture and immobilize prey. Most spiders produce silk from specialized abdominal glands, which they use to build webs, egg sacs, or draglines for movement. They are predatory, feeding primarily on insects and other small invertebrates, and play a vital role in controlling pest populations. Spiders are found worldwide in nearly all terrestrial habitats and exhibit a wide variety of hunting strategies, from web-building to active hunting.