Mourning Cloak Caterpillar (Larva)

Natural Habitat

Found near host trees such as willow, elm, poplar, birch, and hackberry in woodlands and riparian areas.

Diet & Feeding

Herbivorous; feeds on the leaves of deciduous trees including willows, elms, and poplars.

Behavior Patterns

Gregarious and social during early life stages, often feeding in groups. They pupate in a chrysalis to become one of the longest-lived butterflies, which hibernates as an adult.

Risks & Benefits

While they have spines, they are generally not considered harmful to humans. They are beneficial pollinators as adults and serve as a food source for birds.

Identified on: 4/28/2026