Giant Leopard Moth Caterpillar

The giant leopard moth caterpillar is the larval stage of Hypercompe scribonia, a large tiger moth (family Erebidae, subfamily Arctiinae) named for the bold black spots on the adult's white wings. The caterpillar is a familiar sight across much of the eastern and southern United States, often found wandering across lawns, gardens, and roadsides, especially in fall as mature larvae search for overwintering sites.

Unlike some spiny caterpillars, the giant leopard moth larva relies mainly on its dense, bristly setae and defensive curling behavior rather than urticating chemistry, making it a commonly handled and closely observed caterpillar by naturalists and gardeners alike.

• Body covered in dense, stiff black bristles (setae) arranged in tufts around each segment
• Bright red-orange bands visible between body segments, most noticeable when the caterpillar curls up
• Head capsule and true legs glossy black
• Mature larvae reach up to 3 inches (75 mm), among the larger tiger moth caterpillars in its range
• Often confused with woolly bear caterpillars, but the giant leopard moth larva is uniformly black with red intersegmental bands rather than banded black-and-brown fuzz

This species is found in gardens, meadows, woodland edges, and open fields throughout the eastern and southern United States, extending into the Midwest and south into Mexico and Central America. Caterpillars are most often encountered from late summer through fall, when mature larvae leave their feeding sites to search for sheltered overwintering spots, and again in spring as overwintered larvae resume activity briefly before pupating.

The caterpillar feeds on a wide variety of low-growing herbaceous plants, including dandelion, plantain, violets, and many garden and wildflower species, making it a generalist rather than a specialist feeder. When disturbed, it curls tightly into a ball, tucking its head inward and exposing the bright red-orange bands between segments, a startle display that may deter predators. As a broadly polyphagous caterpillar, it plays a role in leaf-litter and low-vegetation food webs, and its bristly, tightly curled defensive posture offers some protection from birds and other predators without relying on stinging spines.

Eggs are laid in clusters on host plant leaves and hatch into small larvae that begin feeding on a wide range of low vegetation. Larvae grow through the late summer and fall, and in northern parts of the range the nearly full-grown caterpillar overwinters in leaf litter or under bark, becoming one of the more commonly seen "woolly" caterpillars crossing roads and lawns in autumn. In spring the caterpillar resumes brief feeding before spinning a loose cocoon incorporating its own bristles, in which it pupates. Adults emerge as large white moths with black spots, and the species generally completes one generation per year in cooler regions, with possibly more in the warm Deep South.