Nessaea hewitsonii
In 3 days ~20% in a week ~50%
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 Yasuní National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 124th most-seen of the 203 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
April and August
In those months about 20% of wildlife watchers report a Hewitson's Olivewing in Yasuní National Park on a given day, against under 5% in March, June–July and September–December, the lowest months.
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.
Among the best
Of the 2 parks where we can rate Hewitson's Olivewing sightings, Yasuní National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Manu National Park (Peru, about 10%).
Same family: Nymphalidae
The closest relatives of the Hewitson's Olivewing that you can see in Yasuní National Park (family Nymphalidae, Brush-footed Butterflies) are Red Peacock (about 30%), Amber Phantom (about 30%) and Godart's Numberwing (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Hewitson's Olivewing is recorded against all the insects logged in Yasuní National Park (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.
