What pest is known for leaving silk webbing as evidence of its presence?

The presence of silk webbing is a distinctive characteristic associated with webbing clothes moths. These moths are known to spin fine threads of silk that form webbing in their habitats, typically within clothing, fabrics, or nests. This webbing acts as a protective barrier for their larvae as they feed on natural fibers, such as wool or silk, leading to damage in garments and other textile items.

Webbing clothes moths are particularly problematic in areas where clothing and other materials are stored. The silk webbing serves as a clear and tangible sign that indicates their infestation, making it easier for pest control professionals and homeowners to identify and address the problem. In contrast, the other pests listed do not create such webbing; they may cause damage through feeding but do not leave behind the silk structures associated with the webbing clothes moth. This makes the webbing clothes moth the correct answer to the question about which pest leaves silk webbing as evidence of its presence.