Caligo illioneus
In 3 days ~20% in a week ~30%
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 Iguaçu National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 246th most-seen of the 279 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
April, August and December–February
In those months about 10% of wildlife watchers report a Dusky Owl-Butterfly in Iguaçu National Park on a given day, against under 5% in March, May–July and September–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.
3rd of 3
Of the 3 parks where we can rate Dusky Owl-Butterfly sightings, Iguaçu National Park ranks 3rd at about 10%. The best odds are in Iberá National Park (Argentina, about 20%) and Iguazú National Park (Argentina, about 10%).
GBIF citizen-science records
It is estimated from how often the Dusky Owl-Butterfly is recorded against all the insects logged in Iguaçu National Park (5 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.
