Automeris io
In 3 days ~40% in a week ~70%
Automeris io, the Io moth (EYE-oh) or peacock moth, is a colorful North American moth in the family Saturniidae. The Io moth is also a member of the subfamily Hemileucinae. The name Io comes from Greek mythology in which Io was a mortal lover of Zeus. The Io moth ranges from the southeast corner of Manitoba and in the southern extremes of Ontario, Quebec, New Brunswick and Nova Scotia in Canada, and in the US it is found from Montana, North Dakota, South Dakota, Nebraska, Colorado, New Mexico, Texas, Utah, east of those states and down to the southern end of Florida. The species was first described by Johan Christian Fabricius in 1775.
Imagines (sexually mature, reproductive stage) have a wingspan of 2.5–3.5 inches (63–88 mm). This species is sexually dimorphic: males have bright yellow forewings, body, and legs, while females have reddish-brown to purple forewings, body, and legs. The males also have much bigger plumose (feathery) antennae than the females. Both males and females have one big black to bluish eyespot with some white in the center, on each hindwing. Some hybridizations have resulted in variations in these hindwing eyespots. Adults live 1–2 weeks... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 2 | Big Cypress National Preserve | 🇺🇸 United States | |
| 3 | Shenandoah National Park | 🇺🇸 United States | |
| 4 | Everglades National Park | 🇺🇸 United States | |
| 5 | Cumbres de Monterrey National Park | 🇲🇽 Mexico | |
| 6 | Congaree National Park | 🇺🇸 United States | |
| 7 | Merritt Island National Wildlife Refuge | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Miami | 🇺🇸 United States | |
| 2 | San Luis Potosí | 🇲🇽 México | |
| 3 | Austin | 🇺🇸 United States | |
| 4 | Houston | 🇺🇸 United States | |
| 5 | Monterrey | 🇲🇽 México | |
| 6 | Orlando | 🇺🇸 United States | |
| 7 | Philadelphia | 🇺🇸 United States | |
| 8 | San Antonio | 🇺🇸 United States | |
| 9 | Mexico City | 🇲🇽 México | |
| 10 | Dallas | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report an Io Moth sighting in Shenandoah National Park on a given day, based on 53 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 63rd most-seen of the 723 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
June and August–September
In those months about 20% of wildlife watchers report an Io Moth in Shenandoah National Park on a given day, against under 5% in November to April, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Io Moth sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
3rd of 7
Of the 7 parks where we can rate Io Moth sightings, Shenandoah National Park ranks 3rd at about 10%. The best odds are in Great Smoky Mountains National Park (United States, about 20%) and Big Cypress National Preserve (United States, about 20%).
Same family: Saturniidae
The closest relatives of the Io Moth that you can see in Shenandoah National Park (family Saturniidae, Emperor and Giant Silk Moths) are North American Luna Moth (about 20%), Rosy Maple Moth (about 20%) and Imperial Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Io Moth is recorded against all the insects logged in Shenandoah National Park (53 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
