Caligo oedipus
In 3 days ~20% in a week ~40%
Caligo oedipus, the boomerang owl, is a butterfly of the family Nymphalidae. The species can be found from Central America to Colombia. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Gandoca-Manzanillo Wildlife Refuge | 🇨🇷 Costa Rica | |
| 2 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 3 | Cahuita National Park | 🇨🇷 Costa Rica | |
| 4 | Arenal Volcano National Park | 🇨🇷 Costa Rica |
With luck
About 10% of wildlife watchers report a Fruhstorfer's Owl-Butterfly sighting in Arenal Volcano National Park on a given day, based on 9 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 152nd most-seen of the 302 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
July
In that month about 20% of wildlife watchers report a Fruhstorfer's Owl-Butterfly in Arenal Volcano National Park on a given day, against under 5% in February–March and September–December, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Fruhstorfer's Owl-Butterfly sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Among the best
Of the 4 parks where we can rate Fruhstorfer's Owl-Butterfly sightings, Arenal Volcano National Park ranks 4th at about 10%, level with the leaders once rounded. The best odds are in Gandoca-Manzanillo Wildlife Refuge (Costa Rica, about 10%), Braulio Carrillo National Park (Costa Rica, about 10%) and Cahuita National Park (Costa Rica, about 10%).
Same genus: Caligo
The closest relatives of the Fruhstorfer's Owl-Butterfly that you can see in Arenal Volcano National Park (genus Caligo, Owl-Butterflies) are Banded Owl-Butterfly (about 20%), Dark Owl-Butterfly (about 10%) and Pale Owl-Butterfly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Fruhstorfer's Owl-Butterfly is recorded against all the insects logged in Arenal Volcano National Park (9 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.
