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 Hong Kong on a given day, based on 20 verified sightings from GBIF citizen-science data. It is the 450th most-seen of the 1125 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.
August to November
In those months about 10% of wildlife watchers report a Syntonarcha iriastis in Hong Kong on a given day, against under 5% in December to July, 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.
Among the best
Of the 3 cities where we can rate Syntonarcha iriastis sightings, Hong Kong ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Perth (Australia, under 5%).
Same family: Crambidae
The closest relatives of the Syntonarcha iriastis that you can see in Hong Kong (family Crambidae, Crambid Snout Moths) are Hawaiian Beet Webworm Moth (about 10%), Heortia vitessoides (about 10%) and Camptomastix hisbonalis (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 Hong Kong (20 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.
