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 Perth on a given day, based on 44 verified sightings from GBIF citizen-science data. It is the 67th most-seen of the 275 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
In that month about 20% of wildlife watchers report a Cabbage Centre Grub in Perth on a given day, against under 5% in March–April, July–August and November–December, the lowest months. That is one of Perth's driest months, with about 20 mm of rain against 130 mm in July.
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.
Yes
Of the 3 cities where we can rate Cabbage Centre Grub sightings, Perth has the highest daily chance: about 10%. Next come Melbourne (Australia, about 10%) and Brisbane (Australia, under 5%).
Same family: Crambidae
The closest relatives of the Cabbage Centre Grub that you can see in Perth (family Crambidae, Crambid Snout Moths) are Hawaiian Beet Webworm Moth (about 10%), Grass Webworm Moth (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 Perth (44 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.
