I have looked at all your caterpillar pages on your wonderful and informative site and have yet to come across this one, which I found early in July munching away on daisy fleabane at our cottage near Peterborough, Ontario. Do you have any idea what it is? Thank your your time.
This is one of the Hooded Owlet Moth Caterpillars. The species is Cucullia speyeri which does feed on fleabane. We found a match on BugGuide.