Udea ferrugalis
In 3 days ~20% in a week ~30%
Udea ferrugalis, the rusty dot pearl, is a moth of the family Crambidae. The species was first described by Jacob Hübner in 1796. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Addo Elephant National Park | 🇿🇦 South Africa | |
| 2 | Pyrénées National Park | 🇫🇷 France | |
| 3 | Cévennes National Park | 🇫🇷 France | |
| 4 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 5 | Wadden Sea National Park | 🇩🇪 Germany | |
| 6 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 7 | Garden Route National Park | 🇿🇦 South Africa | |
| 8 | Kruger National Park | 🇿🇦 South Africa | |
| 9 | Table Mountain National Park | 🇿🇦 South Africa |
With luck
About 10% of wildlife watchers report a Rusty Dot Pearl sighting in Sierra de Guadarrama National Park on a given day, based on 15 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 244th most-seen of the 597 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
May–July and September–November
In those months about 10% of wildlife watchers report a Rusty Dot Pearl in Sierra de Guadarrama National Park on a given day, against under 5% in August and December–April, the lowest months.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Rusty Dot Pearl sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
Among the best
Of the 9 parks where we can rate Rusty Dot Pearl sightings, Sierra de Guadarrama National Park ranks 6th at about 10%, level with the leaders once rounded. The best odds are in Addo Elephant National Park (South Africa, about 10%), Pyrénées National Park (France, about 10%) and Cévennes National Park (France, about 10%).
Same family: Crambidae
The closest relatives of the Rusty Dot Pearl that you can see in Sierra de Guadarrama National Park (family Crambidae, Crambid Snout Moths) are Straw-Barred Pearl (about 20%), Rush Veneer (about 10%) and Jasmine Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Rusty Dot Pearl is recorded against all the insects logged in Sierra de Guadarrama National Park (15 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.
