Caligo illioneus
In 3 days ~30% 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 Fortaleza on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 69th most-seen of the 112 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
July
In that month about 30% of wildlife watchers report a Dusky Owl-Butterfly in Fortaleza on a given day, against under 5% in June and September–March, the lowest months. That is one of Fortaleza's driest months, with about 50 mm of rain against 240 mm in April.
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.
Among the best
Of the 6 cities where we can rate Dusky Owl-Butterfly sightings, Fortaleza ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in São Luís (Brazil, about 10%) and Cali (Colombia, about 10%).
Same family: Nymphalidae
The closest relatives of the Dusky Owl-Butterfly that you can see in Fortaleza (family Nymphalidae, Brush-footed Butterflies) are White Peacock (about 30%), Mexican Fritillary (about 30%) and Variable Cracker (about 30%), 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 Fortaleza (8 verified sightings), 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.
