Udea ferrugalis
In 3 days ~40% in a week ~70%
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 Porto on a given day, based on 164 verified sightings from GBIF citizen-science data. It is the 32nd most-seen of the 498 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
May to August
In those months about 20% of wildlife watchers report a Rusty Dot Pearl in Porto on a given day, against under 5% in December and January, the lowest months. Those are among Porto's driest months, with about 30 mm of rain a month against 140 mm in January.
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.
4th of 30
Of the 30 cities where we can rate Rusty Dot Pearl sightings, Porto ranks 4th at about 10%. The best odds are in Valencia (Spain, about 20%), Antananarivo (Madagascar, about 20%) and Turin (Italy, about 20%).
Same family: Crambidae
The closest relatives of the Rusty Dot Pearl that you can see in Porto (family Crambidae, Crambid Snout Moths) are Jasmine Moth (about 20%), Rush Veneer (about 10%) and Narrow-Winged Grey (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 Porto (164 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.
