Megalopyge opercularis, known as the puss caterpillar, is notable for its furry, cat-like appearance. Found in the southeastern United States, it inhabits trees and shrubs. Despite its cute appearance, its venomous spines can cause painful reactions. The adult moth is called the Southern flannel moth.

Megalopyge opercularis, commonly known as the puss moth or southern flannel moth, is native to the southeastern United States. Its geographical distribution includes states such as Texas, Florida, and parts of the Gulf Coast, extending as far north as Maryland.

Megalopyge opercularis typically inhabits deciduous forests, wooded areas, and gardens. The species thrives in warm, humid climates characteristic of the southeastern U.S., which provide the necessary conditions for its development.

The larvae, or caterpillars, are known for feeding on a variety of host plants, including oak, elm, and citrus trees. The species occupies an ecological niche as a herbivore in forest ecosystems, contributing to the natural cycle of plant material consumption and serving as a prey item for predators.