Automeris io

890055.00 — 7746 — Automeris io (Fabricius, 1775) — Io Moth

Larval Host(s)

Presumed main host
on Block Island:

Known hosts:
Prunus serotina (?)

Polyphagous (woody plants)


This strongly sexually dimorphic species is common in wooded areas during its peak flight season. Females are rare at lights.


  • Species Page at Moth Photographers Group
  • Barcode of Life (BOLD) - Caution: Some specimens shown may not be sequenced. DNA barcode provides evidence of relatedness not proof of identification.
  • Factsheet at Florida Featured Creatures.
  • Ferguson, D. C., 1972. Moths of America North of Mexico, Fascicle 20.2b: p. 157; pl. 12.1-17. order or free PDF
  • Hall et al., 2021. The Moths of North Carolina - website (identification, habitats and life history)
  • Powell, J. A. & P. A. Opler, 2009. Moths of Western North America, Pl. 37.4m; p. 239. Book Review and ordering
  • Species Page at BugGuide