Hellula hydralis
In 3 days ~20% in a week ~40%
Hellula hydralis, the cabbage centre grub, is a moth of the family Crambidae. It was described by Achille Guenée in 1854 and is found throughout Australia. The wingspan is about 20 mm. The larvae feed on Brassica oleracea and Brassica napus. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Hattah-Kulkyne National Park | 🇦🇺 Australia | |
| 2 | Great Otway National Park | 🇦🇺 Australia | |
| 3 | Blue Mountains National Park | 🇦🇺 Australia |
With luck
About 10% of wildlife watchers report a Cabbage Centre Grub sighting in Blue Mountains National Park on a given day, based on 19 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 258th most-seen of the 789 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.
August to April
In those months about 10% of wildlife watchers report a Cabbage Centre Grub in Blue Mountains National Park on a given day, against under 5% in May to July, the lowest months.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Cabbage Centre Grub 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.
3rd of 3
Of the 3 parks where we can rate Cabbage Centre Grub sightings, Blue Mountains National Park ranks 3rd at about 10%. The best odds are in Hattah-Kulkyne National Park (Australia, about 20%) and Great Otway National Park (Australia, about 10%).
Same family: Crambidae
The closest relatives of the Cabbage Centre Grub that you can see in Blue Mountains National Park (family Crambidae, Crambid Snout Moths) are Nacoleia rhoeoalis (about 10%), Eudonia aphrodes (about 10%) and Lesser Rice-Leafroller (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Cabbage Centre Grub is recorded against all the insects logged in Blue Mountains National Park (19 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.
