Hellula undalis
In 3 days ~20% in a week ~40%
Hellula undalis, the cabbage webworm or Old World webworm, is a moth of the family Crambidae. It is a widespread species which is found from Europe across Asia to the Pacific. It was first described from Italy but it is a tropical or subtropical species only occasional in Europe.
The wingspan is about 18 mm. The forewings are greyish-brown with wavy grey markings, a curved pale subterminal patch and a kidney shaped mark at one third. The hindwings are pale, with the tip lighter. It is a pest of Brassica oleracea (cabbage) and Brassica rapa (turnip) Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Table Mountain National Park | 🇿🇦 South Africa |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report an Old World Webworm sighting in Rome on a given day, based on 15 verified sightings from GBIF citizen-science data. It is the 100th most-seen of the 289 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.
September
In that month about 20% of wildlife watchers report an Old World Webworm in Rome on a given day, against under 5% in May–July and December–March, the lowest months.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Old World Webworm sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 10
Of the 10 cities where we can rate Old World Webworm sightings, Rome ranks 2nd at about 10%. The best odds are in Valencia (Spain, about 30%).
Same family: Crambidae
The closest relatives of the Old World Webworm that you can see in Rome (family Crambidae, Crambid Snout Moths) are Narrow-Winged Grey (about 10%), Hawaiian Beet Webworm Moth (about 10%) and Ornate Hydriris Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Old World Webworm is recorded against all the insects logged in Rome (15 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.
