Adhemarius ypsilon
In 3 days ~10% in a week ~30%
Adhemarius ypsilon is a species of moth in the family Sphingidae. It was described by Rothschild and Jordan in 1903 and is known from Costa Rica, Mexico, Belize, Guatemala, Nicaragua, Venezuela, French Guiana, Ecuador, Peru, and Bolivia.
The wingspan is 89–117 mm for males and 107–126 mm for females. In Costa Rica, moths in this species take flight year round. The larvae feed on several species in the plant genus Ocotea (including Ocotea veraguensis, Ocotea atirrensis, Ocotea sarah and Ocotea dendrodaphne). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cerro Azul Meámbar National Park | 🇭🇳 Honduras | |
| 2 | Tapantí-Macizo de la Muerte National Park | 🇨🇷 Costa Rica | |
| 3 | Monteverde Cloud Forest Reserve | 🇨🇷 Costa Rica | |
| 4 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 5 | Arenal Volcano National Park | 🇨🇷 Costa Rica |
Rare
Under 5% of wildlife watchers report an Adhemarius ypsilon sighting in Arenal Volcano National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 256th most-seen of the 302 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
January, March, May and September
In those months about 10% of wildlife watchers report an Adhemarius ypsilon in Arenal Volcano National Park on a given day, against under 5% in February, April, June–August and October–December, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Adhemarius ypsilon sightings with a recorded time, and about 8 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
5th of 5
Of the 5 parks where we can rate Adhemarius ypsilon sightings, Arenal Volcano National Park ranks 5th at under 5%. The best odds are in Cerro Azul Meámbar National Park (Honduras, about 10%), Tapantí-Macizo de la Muerte National Park (Costa Rica, about 10%) and Monteverde Cloud Forest Reserve (Costa Rica, about 10%).
GBIF citizen-science records
It is estimated from how often the Adhemarius ypsilon is recorded against all the insects logged in Arenal Volcano 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.
