Pseudolycaena marsyas
In 3 days ~40% in a week ~70%
Pseudolycaena marsyas, the Cambridge blue, giant hairstreak or Marsyas hairstreak, is a species of butterfly in the family Lycaenidae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Main Ridge Forest Reserve | 🇹🇹 Trinidad and Tobago | |
| 2 | Serra dos Órgãos National Park | 🇧🇷 Brazil | |
| 3 | Iguazú National Park | 🇦🇷 Argentina | |
| 4 | Iguaçu National Park | 🇧🇷 Brazil |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Porto Alegre | 🇧🇷 Brazil | |
| 2 | São Luís | 🇧🇷 Brazil | |
| 3 | Vitória | 🇧🇷 Brazil | |
| 4 | São Paulo | 🇧🇷 Brazil | |
| 5 | Lima | 🇵🇪 Peru | |
| 6 | Brasilia | 🇧🇷 Brazil | |
| 7 | Rio de Janeiro | 🇧🇷 Brazil |
With luck
About 10% of wildlife watchers report a Marsyas Hairstreak sighting in Main Ridge Forest Reserve on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 221st most-seen of the 346 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.
April
In that month about 30% of wildlife watchers report a Marsyas Hairstreak in Main Ridge Forest Reserve on a given day, against under 5% in January–March, May and September–November, the lowest months. That is one of Main Ridge Forest Reserve's driest months, with about 65 mm of rain against 230 mm in October.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Marsyas Hairstreak sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 4 parks where we can rate Marsyas Hairstreak sightings, Main Ridge Forest Reserve has the highest daily chance: about 10%. Next come Serra dos Órgãos National Park (Brazil, about 10%) and Iguazú National Park (Argentina, about 10%).
GBIF citizen-science records
It is estimated from how often the Marsyas Hairstreak is recorded against all the insects logged in Main Ridge Forest Reserve (7 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.
