A beetle is an insect belonging to the order Coleoptera, which is the largest order in the animal kingdom. Beetles are characterized by their hard, shell-like forewings called elytra, which protect their delicate hind wings and bodies. They come in various shapes, sizes, and colors, with over 350,000 species identified worldwide. Beetles can be found in diverse habitats, including forests, deserts, and freshwater environments. Beetles play essential roles in ecosystems, such as decomposing organic matter and pollinating plants. Some common types of beetles include ladybugs, fireflies, and stag beetles. While many beetles are harmless, some species can be pests, damaging crops and stored products.