Caligo illioneus
In 3 days ~40% in a week ~70%
Caligo illioneus, the Illioneus giant owl, is an owl butterfly belonging to the nymphalid family, Morphinae subfamily, tribe Brassolini. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Iberá National Park | 🇦🇷 Argentina | |
| 2 | Iguazú National Park | 🇦🇷 Argentina | |
| 3 | Iguaçu National Park | 🇧🇷 Brazil |
Possible
About 20% of wildlife watchers report a Dusky Owl-Butterfly sighting in Iberá National Park on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 15th most-seen of the 35 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.
February
In that month about 40% of wildlife watchers report a Dusky Owl-Butterfly in Iberá National Park on a given day, against under 5% in June–August and October–December, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Dusky Owl-Butterfly sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 3 parks where we can rate Dusky Owl-Butterfly sightings, Iberá National Park has the highest daily chance: about 20%. Next come Iguazú National Park (Argentina, about 10%) and Iguaçu National Park (Brazil, about 10%).
Same family: Nymphalidae
The closest relatives of the Dusky Owl-Butterfly that you can see in Iberá National Park (family Nymphalidae, Brush-footed Butterflies) are Red Peacock (about 40%), White Peacock (about 40%) and Banded Orange Heliconian (about 40%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Dusky Owl-Butterfly is recorded against all the insects logged in Iberá National Park (9 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.
