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Identifying the specific animal running on your roof at night can be challenging without direct observation. Common nocturnal roof visitors include raccoons, squirrels, opossums, and rats. Raccoons are bigger and can create heavy thumping sounds. Squirrels are agile and may produce rapid scurrying noises. Opossums tend to move stealthily with less noise. Rats can make scratching or gnawing sounds. To determine the culprit, look for signs like footprints, droppings, or damaged areas near the roof. For accurate identification, consult a pest control professional or set up wildlife cameras near potential entry points.

Maintain sealed entry points, use deterrents like spikes or sonic devices, and keep areas clean to discourage nesting.

Both spikes and loose nets can be installed over nest sites to prevent the bird from returning, but nets are not a humane option since birds and other wildlife can get tangled in them. 

Spikes are a humane alternative that deter nesting without harming the birds. In small areas, like vents, a very fine mesh net can be installed to prevent the bird from returning. These nets don't generally pose a risk to the birds.

Alongside selecting the best bait for an iguana trap, the location, position, and timing play a part. If the lizards have a burrow in your yard or regularly take the same route, place the trap there during the day. Iguanas are diurnal and most active during the day. A shady spot is best to keep the animal comfortable. And don’t forget to pick a level surface or stabilize the trap with a brick—iguanas are less likely to enter if it’s wobbly.