I got an email a week or so back from a work colleague, Katie Thierolf, letting me know that she had seen numerous of these caterpillars at the state fairgrounds. Being unable to make a trip down there, I implored her to wrangle some of the cats into a jar, and bring the captured livestock back to the office so I could make some images. She did so - thank you Katie! - and some of the images and a story follow.
Rachel Shoop, a biology student at Marietta College, is studying the DNA variation in these species. Perhaps, as part of her work, she will also unearth morphological characters that will enable us to visually separate the two. Such knowledge will make life more satisfying for moth-ers at the mothing sheets.
Oh, the caterpillars used in this shoot were released into a Sycamore tree at our office complex. Hopefully they will establish a local colony of Sycamore Tussock Moths.