The answer to 'silverfish scratching sounds' is that silverfish are small, silver-colored insects that can make scratching or rustling sounds as they move around. Silverfish are common household pests that feed on materials like paper, wallpaper, and fabrics, and their scratching noises are often a sign of their presence.
Silverfish are primarily nocturnal, so you're more likely to hear their scratching sounds at night when they're active. The sounds can come from behind walls, in cabinets, or other dark, damp areas where they like to hide. If the scratching is persistent or you see other signs of silverfish, it's a good idea to take action to eliminate them.