The answer to 'carpenter ant scratching sounds' is that carpenter ants make a faint scratching or rustling noise as they tunnel and move through the wood in your home. This is a common sign of a carpenter ant infestation. Carpenter ants do not actually eat the wood, but they hollow it out to create nests and tunnels, which can cause structural damage over time if left untreated.
The scratching noises are typically heard at night when the ants are most active. You may also notice small piles of wood shavings or debris near the nest location. If you suspect a carpenter ant problem, it's best to have a professional pest control technician inspect your home and recommend the appropriate treatment, as DIY methods are often not effective against these persistent pests.