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 Melbourne on a given day, based on 124 verified sightings from GBIF citizen-science data. It is the 129th most-seen of the 875 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.
January–May, September and November
In those months about 10% of wildlife watchers report a Cabbage Centre Grub in Melbourne on a given day, against under 5% in June–August, October and December, 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.
Among the best
Of the 3 cities where we can rate Cabbage Centre Grub sightings, Melbourne ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Perth (Australia, about 10%).
Same family: Crambidae
The closest relatives of the Cabbage Centre Grub that you can see in Melbourne (family Crambidae, Crambid Snout Moths) are Scoparia exhibitalis (about 10%), Nacoleia rhoeoalis (about 10%) and Tree Lucerne Moth (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 Melbourne (124 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.
