Castniomera atymnius
In 3 days ~30% in a week ~50%
Castniomera is a monotypic genus of moths in the family Castniidae described by Constant Vincent Houlbert in 1918. Its single species, Castniomera atymnius, commonly known as the giant butterfly-moth, was first described by Johan Wilhelm Dalman in 1824. It is known from Mexico through Central America to Venezuela.
The larvae feed on Musaceae species. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tortuguero National Park | 🇨🇷 Costa Rica | |
| 2 | Gandoca-Manzanillo Wildlife Refuge | 🇨🇷 Costa Rica | |
| 3 | Masaya Volcano National Park | 🇳🇮 Nicaragua | |
| 4 | Tenorio Volcano National Park | 🇨🇷 Costa Rica | |
| 5 | Piedras Blancas National Park | 🇨🇷 Costa Rica | |
| 6 | Braulio Carrillo National Park | 🇨🇷 Costa Rica | |
| 7 | Arenal Volcano National Park | 🇨🇷 Costa Rica | |
| 8 | Corcovado National Park | 🇨🇷 Costa Rica | |
| 9 | Soberanía National Park | 🇵🇦 Panama | |
| 10 | Cahuita National Park | 🇨🇷 Costa Rica | |
| 11 | Manuel Antonio National Park | 🇨🇷 Costa Rica | |
| 12 | Parque Natural Metropolitano | 🇵🇦 Panama |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San Salvador | 🇸🇻 El Salvador | |
| 2 | San José | 🇨🇷 Costa Rica | |
| 3 | Panama City | 🇵🇦 Panama |
With luck
About 10% of wildlife watchers report a Screwworm sighting in San Salvador on a given day, based on 14 verified sightings from GBIF citizen-science data. It is the 15th most-seen of the 72 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.
November
In that month about 20% of wildlife watchers report a Screwworm in San Salvador on a given day, against under 5% in January–February and April–May, the lowest months. That is one of San Salvador's driest months, with about 50 mm of rain against 280 mm in September.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Screwworm sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 3 cities where we can rate Screwworm sightings, San Salvador has the highest daily chance: about 10%. Next come San José (Costa Rica, about 10%) and Panama City (Panama, under 5%).
Same order: Lepidoptera
The closest relatives of the Screwworm that you can see in San Salvador (order Lepidoptera, Butterflies and Moths) are Banded Peacock (about 30%), Thick-Tipped Greta (about 20%) and Black Witch (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Screwworm is recorded against all the insects logged in San Salvador (14 verified sightings), 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.
