Gracillariidae is a family of small moths known as leaf miners. They are characterized by their slender bodies and narrow wings, which are often held close to their bodies when at rest. The larvae of these moths typically feed within the leaves of plants, creating distinctive mines that can be seen as winding trails or blotches. This family includes many species that are found worldwide, with a significant number in North America and Europe. The adult moths are usually nocturnal and can be attracted to lights. Their life cycle includes egg, larval, pupal, and adult stages, with the larval stage being the most notable for its leaf-mining behavior.