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Yes, mulch can attract pests. Spiders, centipedes, and ants are some common pests that are attracted to mulch. You can avoid infestation by laying your bags of mulch in the heat for a few hours or by using an inorganic mulch, as it’s less attractive to pests.

It can be difficult to know what type of animal is in your attic until you see it. But several clues can help you narrow down the suspects:

• Sounds: Smaller animals like rats and mice make scurrying and tapping/gnawing sounds. Larger animals like raccoons and opossums make louder clambering noises. Also, note when animals are noisy: Squirrels are active during the day, while rats are busiest at night.

• Droppings: Rats and mice leave small, rice-shaped droppings (the rat’s version is significantly larger). Bigger droppings belong to larger critters like raccoons. As long as you’re not squeamish, an image search can help you identify what you’re seeing in your attic.

When in doubt, take photos of damage or other evidence and show them to an experienced pest control pro.

Squirrels have a strong sense of smell and can be deterred by various scents they dislike. Effective options include peppermint oil, rosemary, garlic, cinnamon, white vinegar, coffee grounds, and predator urine. Squirrels also have a strong aversion to capsaicin, the compound that makes chili peppers hot, making capsaicin-based repellents a good choice for protecting specific areas like gardens or bird feeders. For a DIY solution, you can create a garlic and vinegar spray and apply it daily. Additionally, placing strong-smelling items like certain soaps or dryer sheets near where squirrels frequent can also be effective.

Moles live underground and feed on insects. They dig and move through tunnels, usually in meadows or forests but sometimes in lawns and gardens. They are about 6 inches long with large claws, tiny eyes, and hidden ears. 

Shrews do not dig their own tunnels but will use other animals’ tunnels, and are about 3 to 4 inches long. They look similar to mice and feed on insects.

Voles are similar in size to moles but have large eyes and small but visible ears. Rather than eating insects, voles are herbivores that prefer seeds, grasses, and plant roots.