Pyrisitia leuce
In 3 days ~30% in a week ~60%
Eurema leuce, the Hall's sulphur, is a butterfly in the family Pieridae. It is found on the West Indies and in Brazil, Uruguay, Colombia, and Venezuela. The length of the forewings is 17–21 mm for males and females. Adults have been recorded feeding on Bidens pilosa, Tournefortia hirsutissima, and Croton barahonensis. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Iguazú National Park | 🇦🇷 Argentina | |
| 2 | Iguaçu National Park | 🇧🇷 Brazil |
With luck
About 10% of wildlife watchers report a Leuce Yellow sighting in Iguaçu National Park on a given day, based on 23 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 97th most-seen of the 279 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
June and July
In those months about 20% of wildlife watchers report a Leuce Yellow in Iguaçu National Park on a given day, against under 5% in March–April and November–January, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Leuce Yellow sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 2 parks where we can rate Leuce Yellow sightings, Iguaçu National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Iguazú National Park (Argentina, about 10%).
Same family: Pieridae
The closest relatives of the Leuce Yellow that you can see in Iguaçu National Park (family Pieridae, Whites, Yellows, and Sulphurs) are Dark Apricot Sulphur (about 20%), Tailed Sulphur (about 20%) and Great Southern White (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Leuce Yellow is recorded against all the insects logged in Iguaçu National Park (23 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.
