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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.

No single deterrent will work 100 percent of the time, so we suggest combining deterrents to ensure your seed has the best possible chance to grow. Using bird netting over your seed, with physical deterrents like mylar tape coupled with hanging bird feeders at the edges of your growing area—and removing any bird’s nests, if possible—will give your seeds the best possible chance for success.

Small amounts of geese are actually good for the environment. They help spread seeds and lead to more plant growth, but they’re often an invasive species, particularly Canadian geese. This means a small gaggle can quickly grow into a level that litters your lawn with bald patches and excrement.

Numerous predators kill hornets, including frogs, birds, lizards, bats, spiders, and hedgehogs. Some larger predators, including rats, skunks, and racoons, will occasionally attack a hornet nest in order to eat the larvae inside. These natural predators typically don’t eat enough hornets to make them an effective form of hornet control.