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 Niterói on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 37th most-seen of the 46 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.
March and May
In those months about 20% of wildlife watchers report a Cissia eous in Niterói on a given day, against under 5% in January–February, April and June–November, 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.
Among the best
Of the 7 cities where we can rate Cissia eous sightings, Niterói ranks 6th at about 10%, level with the leaders once rounded. The best odds are in São Paulo (Brazil, about 10%), Campinas (Brazil, about 10%) and Porto Alegre (Brazil, about 10%).
Same family: Nymphalidae
The closest relatives of the Cissia eous that you can see in Niterói (family Nymphalidae, Brush-footed Butterflies) are White Peacock (about 20%), Gulf Fritillary (about 20%) and Julia Heliconian (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 Niterói (5 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.
