Subject: What is it?
Location: Thunder Bay Ontario Canada
August 9, 2017 6:28 pm
Hi just curious on these 2 types of caterpillars found
Signature: Colin Burridge

Columbia Silkmoth Caterpillar

Dear Colin,
Our research on BugGuide indicates this is a Columbia Silkmoth Caterpillar,
Hyalophora columbia columbia, which is the north eastern subspecies.  According to BugGuide:  “In eastern North America [ssp. columbia], the preferred food of larvae is Tamarack (American Larch – Larix laricina).”

Location: Thunder Bay, Ontario, Canada

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