Coelosis biloba
In 3 days ~30% in a week ~50%
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Rincón de la Vieja National Park | 🇨🇷 Costa Rica | |
| 2 | Masaya Volcano National Park | 🇳🇮 Nicaragua | |
| 3 | Tenorio Volcano National Park | 🇨🇷 Costa Rica | |
| 4 | Ostional Wildlife Refuge | 🇨🇷 Costa Rica | |
| 5 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 6 | Arenal Volcano National Park | 🇨🇷 Costa Rica | |
| 7 | Manu National Park | 🇵🇪 Peru | |
| 8 | Monteverde Cloud Forest Reserve | 🇨🇷 Costa Rica | |
| 9 | Tapantí-Macizo de la Muerte National Park | 🇨🇷 Costa Rica | |
| 10 | Tijuca National Park | 🇧🇷 Brazil |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San José | 🇨🇷 Costa Rica | |
| 2 | Niterói | 🇧🇷 Brazil | |
| 3 | Panama City | 🇵🇦 Panama | |
| 4 | Rio de Janeiro | 🇧🇷 Brazil | |
| 5 | Medellín | 🇨🇴 Colombia | |
| 6 | São Paulo | 🇧🇷 Brazil |
With luck
About 10% of wildlife watchers report a Coelosis biloba sighting in Arenal Volcano National Park on a given day, based on 20 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 57th most-seen of the 302 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
January and September
In those months about 20% of wildlife watchers report a Coelosis biloba in Arenal Volcano National Park on a given day, against under 5% in March, July and December, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Coelosis biloba sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is seen both by day and at night.
6th of 10
Of the 10 parks where we can rate Coelosis biloba sightings, Arenal Volcano National Park ranks 6th at about 10%. The best odds are in Rincón de la Vieja National Park (Costa Rica, about 20%), Masaya Volcano National Park (Nicaragua, about 20%) and Tenorio Volcano National Park (Costa Rica, about 10%).
Same family: Scarabaeidae
The closest relatives of the Coelosis biloba that you can see in Arenal Volcano National Park (family Scarabaeidae, Scarabs) are Ancognatha vulgaris (about 10%), Cyclocephala lunulata (about 10%) and Elephant Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Coelosis biloba is recorded against all the insects logged in Arenal Volcano National Park (20 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.
