This article will describe a few common hairy caterpillars that are found in the fall and discuss what to do if you see one. To properly identify these caterpillars requires a prepared specimen with a microscope. Unfortunately, those hairs are often missing because they break off naturally as part of the caterpillar’s defense mechanism. Some sources might tell you to use the location and number of the longer tufts of white or black hairs to identify these caterpillars. Most of these caterpillars come in a range of colors from bright yellow to bright white even within the same species. Identifying fuzzy caterpillars in the fall is challenging, even for trained entomologists. For any unknown insect, it is always best to avoid making contact unless you are familiar with the species and potential risks for stings or irritation. Some have stories told about them that are best termed fanciful or imaginative. Most commonly are “What is this?” and “Can I touch it?” From a distance, these caterpillars appear inviting with variable coloration and tufts of hair protruding from their exoskeleton. Hairy or fuzzy caterpillars are a curious sight that elicit questions to Michigan State University Extension educators.
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