Hellula rogatalis
In 3 days ~10% in a week ~20%
Hellula rogatalis, the cabbage webworm, is a moth of the family Crambidae described by George Duryea Hulst in 1886. It is found from the southern United States north in the east to Maryland, New York and Ontario. It is also found in Mexico, where it has been recorded from Distrito Federal.
The wingspan is 15–21 mm. The forewings are brownish yellow or grayish yellow with wavy white antemedial median, and postmedial lines. The subterminal line consists of several equally spaced black dots. The hindwings are light gray or grayish yellow with a dark terminal line and pale fringe. Adults are on wing from late March to October in the south and from June to October in the north. There are several generations per year in the south.
The larvae feed on a wide range of Brassicaceae and related species, including cabbage, turnip, beet, collard, cauliflower, kale, rutabaga, radish, kohlrabi, mustard, rape, horseradish, shepherd's purse and purslane. They feed on the leaf buds and young leaves of their host plant. They create a silken web. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Channel Islands National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San Diego | 🇺🇸 United States | |
| 2 | Los Angeles | 🇺🇸 United States | |
| 3 | San Francisco | 🇺🇸 United States | |
| 4 | Austin | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Cabbage Webworm Moth sighting in San Francisco on a given day, based on 30 verified sightings from GBIF citizen-science data. It is the 287th most-seen of the 737 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Cabbage Webworm Moth in San Francisco on a given day, so our monthly data shows no clear season.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Cabbage Webworm Moth sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 4 cities where we can rate Cabbage Webworm Moth sightings, San Francisco ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in San Diego (United States, under 5%) and Los Angeles (United States, under 5%).
Same family: Crambidae
The closest relatives of the Cabbage Webworm Moth that you can see in San Francisco (family Crambidae, Crambid Snout Moths) are Genista Broom Moth (about 10%), Volupial Mint Moth (about 10%) and California Pyrausta Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Cabbage Webworm Moth is recorded against all the insects logged in San Francisco (30 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.
