Nessaea hewitsonii
In 3 days ~30% in a week ~60%
Nessaea hewitsonii, the Hewitson's olivewing, is a species of butterfly of the family Nymphalidae. It is common in a broad range of the Amazon basin including the eastern slopes of the Andes mountain range. It is found in high evergreen tropical forest, semi-deciduous tropical forest, and riverine forest.
The length of the wings is 33–40 mm for males and 36–41 mm for females. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Manu National Park | 🇵🇪 Peru | |
| 2 | Yasuní National Park | 🇪🇨 Ecuador |
With luck
About 10% of wildlife watchers report a Hewitson's Olivewing sighting in Manu National Park on a given day, based on 15 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 83rd most-seen of the 366 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.
September
In that month about 30% of wildlife watchers report a Hewitson's Olivewing in Manu National Park on a given day, against under 5% in March–August and December, the lowest months. That is one of Manu National Park's driest months, with about 90 mm of rain against 290 mm in February.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Hewitson's Olivewing 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 2 parks where we can rate Hewitson's Olivewing sightings, Manu National Park has the highest daily chance: about 10%. Next come Yasuní National Park (Ecuador, about 10%).
GBIF citizen-science records
It is estimated from how often the Hewitson's Olivewing is recorded against all the insects logged in Manu National Park (15 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.
