Linden Looper (Erannis tilaria) - Linden looper larvae are variable in color, ranging from vivid green to dark brown, with three thin yellow lines on each side of the body. Spiny loopers are pinkish with hairy tubercles and black lines running their length, and fall cankerworm larvae range from very light green to dark brownish-green. The head and anal segments are also variable in color, ranging from pale green to black or mottled. Darker larvae may have a longitudinal black stripe, while lighter color forms have white lines running their length. Though larger loopers tend to feed voraciously, consuming all but the mid rib and larger veins, younger larvae may work as skeletonizers (eg., fall cankerworm) or give leaves the appearance of Swiss cheese.