Be careful with Hickory Tussock Moth caterpillars (pics below). If touched, the hairs on these caterpillars can cause contact dermatitis and a reaction similar to touching poison ivy.
If interested, the Huron County Health Unit has more information here:
https://www.huronhealthunit.ca/health-topics/environment/hickory-tussock-moth-caterpillars/
Gardening Kingston 
Is the caterpillar dangerous?
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