Over the weekend, my good friend Ron Rothhaas (President, Arbor Doctor) sent me a nice picture of a colony of Yellownecked Caterpillars (Datana ministra) rearing their ugly heads, and other ends, in a park in Hamilton County. Coincidentally, at about the same time that he must have been taking his picture, I was taking pictures of Walnut Caterpillars (D. integerrima) on their namesake host in a park in Butler County. 'Tis the season!