Arcte coerula
In 3 days ~40% in a week ~70%
Arcte coerula, the ramie moth, is a moth of the family Noctuidae. The species was first described by Achille Guenée in 1852. It is found from in south-east Asia, including Fiji, India, Sri Lanka, Myanmar, Japan, New Guinea, Taiwan and Norfolk Island. It has been recently observed in Hawaii, on the island of Maui.
Its wingspan is about 84 mm. The mid and hind tibia are spiny. Hindwings of male with long hairy inner margin. Head black and thorax vinous reddish brown. Pectus white. Abdomen bluish fuscous with a white tuft in male below claspers. Forewings with brown suffused with black, except costal area as far as postmedial line and the apical area, and sprinkled with a few bluish-white scales. A short almost basal line, two black sub-basal patches, an oblique waved antemedial line present. A black spot in cell and two lunules at end of cell. Traces of a pale waved sub-marginal line can be seen. Hindwings are black with a bright blue patch on disk and a maculate post-medial band and patch near anal angle.
Larva black. Somites with transverse dorsal white bars each enclosing a black line. Stigmata ochreous, black ridges and with some red color around, situated on white... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nikko National Park | 🇯🇵 Japan |
More parks will be added in future updates.
Possible
About 20% of wildlife watchers report a Ramie Moth sighting in Nikko National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 53rd most-seen of the 86 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
August and October–November
In those months about 30% of wildlife watchers report a Ramie Moth in Nikko National Park on a given day, against under 5% in February–May, July, September and December, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Ramie Moth sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Nikko National Park, in our data
Nikko National Park is the only park on Wallace's Line with enough records to rate Ramie Moth sightings: about 20% of wildlife watchers there report one on a given day.
Same family: Erebidae
The closest relatives of the Ramie Moth that you can see in Nikko National Park (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are Kidokuga piperita (about 20%), Macrobrochis staudingeri (about 20%) and Catocala streckeri (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Ramie Moth is recorded against all the insects logged in Nikko National Park (5 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.
