The answer to 'ant scratching sounds' is that the sounds are likely caused by ants moving and foraging within the walls or floors of your home. Ants make scratching or rustling noises as they build nests, search for food, or move through the structure.
These sounds can be concerning, but they are usually not a sign of a major infestation. However, if the noises persist or get worse, it may indicate a larger ant problem that requires professional pest control treatment. In that case, it's best to call an experienced exterminator to properly identify the ant species and implement effective control measures.