Quite the impressive caterpillar. Caterpillar of the Canadian Owlet Moth (Calyptra canadensis). Native to most of Canada and the United States.
Adults have a wingspan of a bit less than 1.5 inches and are pale brown, looking much like a dried up leaf, a perfect camouflage.
The caterpillars of Canadian Owlet Moths feed exclusively on Meadow Rue (Thalictrum).
The coloring of the caterpillar, which I find appealing, is a warning coloration. A warning to predators that they have a very bad taste.
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