Adhemarius eurysthenes
In 3 days ~40% in a week ~60%
Adhemarius eurysthenes is a species of moth in the family Sphingidae. It was described by Rudolf Felder in 1874, and is known from Brazil, Colombia and Paraguay. It is similar to Adhemarius palmeri, but the forewing upperside subbasal band is complete and irregular along proximal margin, the antemedian oblique line is very narrow, almost transverse and reaching the costa just distal to the subbasal band and the subapical patch is smaller and bluntly triangular. The hindwing upperside marginal band is also narrower.
There are probably at least two generations per year with peak flights in February and from July to August. The larvae probably feed on Ocotea (such as Ocotea veraguensis, Ocotea atirrensis and Ocotea dendrodaphne) and Persea species. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Itatiaia National Park | 🇧🇷 Brazil |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Porto Alegre | 🇧🇷 Brazil |
With luck
About 10% of wildlife watchers report an Adhemarius eurysthenes sighting in Itatiaia National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 30th most-seen of the 60 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 60%, if each day is a fresh chance.
February and October
In those months about 30% of wildlife watchers report an Adhemarius eurysthenes in Itatiaia National Park on a given day, against under 5% in March–September and November–December, the lowest months. Those are among Itatiaia National Park's wettest months, with about 250 mm of rain a month against 25 mm in July.
Between 6 and 9 pm
Across all the parks we cover, that three-hour window holds the most Adhemarius eurysthenes sightings with a recorded time, and nearly all of them come between 6 pm and 6 am: it is mostly seen at night.
Only Itatiaia National Park, in our data
Itatiaia National Park is the only park on Wallace's Line with enough records to rate Adhemarius eurysthenes sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Sphingidae
The closest relatives of the Adhemarius eurysthenes that you can see in Itatiaia National Park (family Sphingidae, Sphinx Moths) are Lesser Ficus Sphinx (about 20%), Xylophanes schausi (about 20%) and Manduca diffissa (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Adhemarius eurysthenes is recorded against all the insects logged in Itatiaia National Park (6 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.
