Cecropia Moth
What is cecropia moth?
Key facts
The cecropia moth (Hyalophora cecropia) is the largest native moth in North America, with a wingspan of five to seven inches. It is nocturnal and found in hardwood forests east of the Rocky Mountains.
Context
The cecropia moth (Hyalophora cecropia) is a giant silk moth and the largest native moth in North America [1]. It is a nocturnal species found in hardwood forests east of the Rocky Mountains in the United States and Canada [1]. Adults do not feed because they lack functioning mouthparts [1]. The caterpillars feed on leaves of hardwood trees, including maple, cherry, and birch [1]. Adults emerge in spring, mate, and lay eggs; one generation occurs per year [1]. They overwinter as pupae in cocoons attached to twigs [1]. This silk moth is often attracted to street and porch lights, which is where most people encounter it [1]. As a moth, it plays a role in the ecosystem as a pollinator and prey.
Documented claims
Related
Questions and answers
Is it rare to see a cecropia moth?
Cecropia moths are not rare, but they are nocturnal and often attracted to lights, so encounters are more common at night [1].
Is the cecropia moth found in Canada?
Yes, it is found in eastern Canada, east of the Rocky Mountains [1].
What does it mean when you see a cecropia moth?
Seeing a cecropia moth is a sign of a healthy hardwood forest ecosystem, as it depends on specific host trees [1].
Are cecropia moths poisonous?
No, cecropia moths are not poisonous; they lack mouthparts and do not feed as adults [1].
Sources
- Species Spotlight - Cecropia Moth (U.S. National Park ... — nps.gov (retrieved August 3, 2026)