Syntonarcha iriastis
In 3 days ~20% in a week ~30%
Syntonarcha iriastis is a moth in the family Crambidae. It was described by Edward Meyrick in 1890. It is found in the western Pacific, including Hong Kong, New Caledonia and most of Australia, where it has been recorded from Western Australia, the Northern Territory, Queensland and New South Wales.
Males of the species produce an ultrasonic sound by rubbing their genitalia against one of their sternites. It is hypothesized that this is used to attract mates over long distances. The wingspan is about 25 mm. The forewings are light brownish ochreous. The hindwings are whitish. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Otway National Park | 🇦🇺 Australia |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Syntonarcha iriastis sighting in Great Otway National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 286th most-seen of the 418 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
January
In that month about 20% of wildlife watchers report a Syntonarcha iriastis in Great Otway National Park on a given day, against under 5% in March to December, the lowest months.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Syntonarcha iriastis sightings with a recorded time, and nearly all of them come between 6 pm and 6 am: it is mostly seen at night.
Only Great Otway National Park, in our data
Great Otway National Park is the only park on Wallace's Line with enough records to rate Syntonarcha iriastis sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Crambidae
The closest relatives of the Syntonarcha iriastis that you can see in Great Otway National Park (family Crambidae, Crambid Snout Moths) are Tree Lucerne Moth (about 20%), Pond Moth (about 10%) and Cabbage Centre Grub (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Syntonarcha iriastis is recorded against all the insects logged in Great Otway 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.
