Northern Prairie Wildlife Research Center
Smooth, elongate, set with gray, tan, brown, white and black wavy stripes; highly variable in color. Head with indistinct mottling and prominent black spots. Dorsal setal bases and spiracles black. Small warts on dorsum of eighth abdominal segment. Curve-lined looper moth (L. fervidaria) similar but usually with distinct orange or black subdorsal stripe, body darker laterally, and black spots on head sometimes enlarged (especially on oaks). Food: oaks and other hardwoods, as well as pines, firs, and hemlocks. Caterpillar: June to October; 2 generations in South, 1 in North.