Cissia eous
In 3 days ~40% in a week ~70%
Cissia eous, locally known as the brown butterfly (Brazilian Portuguese: borboleta marrom), is a butterfly in the family Nymphalidae described by Arthur Gardiner Butler in 1867. It is found in the countries of Brazil, Argentina, Uruguay and Paraguay. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Serra dos Órgãos National Park | 🇧🇷 Brazil | |
| 2 | Iguazú National Park | 🇦🇷 Argentina | |
| 3 | Iguaçu National Park | 🇧🇷 Brazil | |
| 4 | Tijuca National Park | 🇧🇷 Brazil |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | São Paulo | 🇧🇷 Brazil | |
| 2 | Campinas | 🇧🇷 Brazil | |
| 3 | Porto Alegre | 🇧🇷 Brazil | |
| 4 | Vitória | 🇧🇷 Brazil | |
| 5 | Belo Horizonte | 🇧🇷 Brazil | |
| 6 | Niterói | 🇧🇷 Brazil | |
| 7 | Rio de Janeiro | 🇧🇷 Brazil |
Possible
About 20% of wildlife watchers report a Cissia eous sighting in Serra dos Órgãos National Park on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 29th most-seen of the 117 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.
November
In that month about 30% of wildlife watchers report a Cissia eous in Serra dos Órgãos National Park on a given day, against under 5% in May, July and September–October, the lowest months. That is one of Serra dos Órgãos National Park's wettest months, with about 310 mm of rain against 50 mm in July.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Cissia eous sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 4 parks where we can rate Cissia eous sightings, Serra dos Órgãos 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 Cissia eous that you can see in Serra dos Órgãos National Park (family Nymphalidae, Brush-footed Butterflies) are Dark Owl-Butterfly (about 30%), Melinaea ludovica (about 20%) and White Peacock (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Cissia eous is recorded against all the insects logged in Serra dos Órgãos 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.
