Syntonarcha iriastis
In 3 days ~10% 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.
Rare
Under 5% of wildlife watchers report a Syntonarcha iriastis sighting in Perth on a given day, based on 13 verified sightings from GBIF citizen-science data. It is the 154th most-seen of the 275 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
January–March and October
In those months about 10% of wildlife watchers report a Syntonarcha iriastis in Perth on a given day, against under 5% in April–September and November–December, the lowest months. Those are among Perth's driest months, with about 20 mm of rain a month against 130 mm in July.
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.
Yes
Of the 3 cities where we can rate Syntonarcha iriastis sightings, Perth has the highest daily chance: under 5%. Next come Hong Kong (China, under 5%) and Auckland (New Zealand, under 5%).
Same family: Crambidae
The closest relatives of the Syntonarcha iriastis that you can see in Perth (family Crambidae, Crambid Snout Moths) are Hawaiian Beet Webworm Moth (about 10%), Cabbage Centre Grub (about 10%) and Grass Webworm Moth (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 Perth (13 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.
