Cissia eous
In 3 days ~20% in a week ~40%
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 |
With luck
About 10% of wildlife watchers report a Cissia eous sighting in Tijuca National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 53rd most-seen of the 132 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
May, July–August and November–January
In those months about 10% of wildlife watchers report a Cissia eous in Tijuca National Park on a given day, against under 5% in February–April, June and September–October, the lowest months.
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.
4th of 4
Of the 4 parks where we can rate Cissia eous sightings, Tijuca National Park ranks 4th at about 10%. The best odds are in Serra dos Órgãos National Park (Brazil, about 20%), 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 Tijuca National Park (family Nymphalidae, Brush-footed Butterflies) are White Peacock (about 20%), Julia Heliconian (about 10%) and Melinaea ludovica (about 10%), 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 Tijuca 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.
