Its production may contain traces of hair, textile fibers, plant remains, clothing threads, grains of sand, dust, and tiny fragments of animal or plant origin.
This is why the appearance of the case varies depending on where it is located: it can be lighter or darker, rough or smooth, blending into the surface on which it is placed and easily going unnoticed.
These small cases are usually found in areas they consider protected in the house, such as corners, behind furniture, in high ceilings, or in places that are not cleaned frequently.
There, the larva moves slowly, revealing only part of its body before immediately retreating to its shelter. This behavior has attracted the interest of experts and observers, as it represents an extremely effective survival strategy.
The life cycle of the sheath butterfly begins when the adult female lays between 35 and 50 eggs near food sources.
About a week later, the eggs hatch and the larvae emerge, almost immediately beginning to build their characteristic case. From then on, their main objective will be to feed and grow until the end of their development.
