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Pest Library · Rodents & wildlifeSquirrels Identification Guide
How to tell if squirrels are in your attic and how they get in.
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How to identify
What squirrels look like
Eastern grey squirrels, including the black colour phase common in Toronto, are agile climbers that chew their way into roofs.
They are active during the day, especially early morning and late afternoon.
Signs you have squirrels
- Scurrying and scratching in the attic in the morning
- Chewed holes in soffits, fascia or roof vents
- Nesting material visible at roof gaps
Are they dangerous?
Squirrels chew wood, insulation and wiring, and can damage roofs and create fire risks.
How to prevent them
- Trim branches at least 2 metres from the roof
- Screen roof and soffit vents
- Repair damaged soffits quickly
Quick facts
Scientific nameSciurus carolinensis
Size40–50 cm with tail
ColourGrey or black
Most activeYear-round, active at dawn
Found inAttics, soffits, roof vents
Risk levelModerate (chewing damage)
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