Spiders are eight-legged arachnids that belong to the class Arachnida. They are known for their ability to produce silk, which they use to create webs for trapping prey. Spiders play a crucial role in controlling insect populations, making them important for ecosystems. They can be found in various habitats, from forests to deserts, and exhibit a wide range of sizes and colors. There are over 45,000 known species of spiders, each with unique characteristics. Some, like the Black Widow, are famous for their venom, while others, like the Tarantula, are known for their size. Despite their often fearsome reputation, most spiders are harmless to humans and contribute positively to the environment.