They can have a deterrent effect on birds to some extent. The reflective surfaces of these objects, such as aluminum foil strips, CDs, or reflective tape, create flashes of light and movement that can startle or confuse birds temporarily. However, some birds can become accustomed to these visual disturbances over time and might adapt their behavior accordingly. For a more sustained solution, combining shiny objects with other deterrent methods shared here is often beneficial for creating a more comprehensive and effective strategy for bird control.

Look for goose repellents that contain the ingredient methyl anthranilate. This is a natural chemical found in grape juice. In human food, it’s often used as grape flavoring. With geese, it’s highly irritating. Grape Kool-Aid contains methyl anthranilate, the active ingredient in most bird repellents. It won’t harm geese, but it will deter them.

Fake owls are a common goose deterrent decoy and one of the most humane ways to scare away geese. Unfortunately, some geese are wise to fake predators. Decoys can be more effective if you move them around frequently or purchase ones with motion features. Decoys that move in the wind are also more effective than stationary decoys.

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.