Caligo illioneus
In 3 days ~20% in a week ~50%
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 |
With luck
About 10% of wildlife watchers report a Dusky Owl-Butterfly sighting in Iguazú National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 168th most-seen of the 306 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
February
In that month about 20% of wildlife watchers report a Dusky Owl-Butterfly in Iguazú National Park on a given day, against under 5% in March, May–July and November, 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.
2nd of 3
Of the 3 parks where we can rate Dusky Owl-Butterfly sightings, Iguazú National Park ranks 2nd at about 10%. The best odds are in Iberá National Park (Argentina, about 20%).
GBIF citizen-science records
It is estimated from how often the Dusky Owl-Butterfly is recorded against all the insects logged in Iguazú National Park (10 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.
