Hellula undalis
In 3 days ~10% in a week ~20%
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.
Rare
Under 5% of wildlife watchers report an Old World Webworm sighting in Table Mountain National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 219th most-seen of the 344 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
April
In that month about 10% of wildlife watchers report an Old World Webworm in Table Mountain National Park on a given day, against under 5% in May to 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.
Only Table Mountain National Park, in our data
Table Mountain National Park is the only park on Wallace's Line with enough records to rate Old World Webworm sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Old World Webworm is recorded against all the insects logged in Table Mountain National Park (10 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.
