Northern Prairie Wildlife Research Center
Deep green, stunningly marked with red, white, and yellow. Head pale green, unmarked. White dorsal stripe continuous; subdorsal and spiracular stripes broken into oval spots; spiracular stripe divided into red-black, red, and white portions, more convex below. Subventral stripe broken, of yellowish spots. Two other Feralia co-occur over much of range with similar patterning. Food: firs, hemlocks, pines, spruces, and other conifers. Caterpillar: May to July; 1 generation.