Thysanura is an order of insects that includes species commonly known as silverfish and firebrats. These small, wingless creatures are characterized by their elongated bodies, long antennae, and three long tail-like appendages. They are typically found in dark, damp environments such as basements, bathrooms, and kitchens, where they feed on starchy materials like paper and glue. Thysanura are ancient insects, with a lineage that dates back over 400 million years, making them one of the oldest living insect groups. They are nocturnal and move quickly, often evading detection. Their ability to thrive in various habitats contributes to their widespread presence around the world.