Arcte coerula
In 3 days ~20% in a week ~40%
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.
With luck
About 10% of wildlife watchers report a Ramie Moth sighting in Tokyo on a given day, based on 113 verified sightings from GBIF citizen-science data. It is the 137th most-seen of the 1013 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.
April to December
In those months about 10% of wildlife watchers report a Ramie Moth in Tokyo on a given day, against under 5% in January to March, 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.
Among the best
Of the 4 cities where we can rate Ramie Moth sightings, Tokyo ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Nagoya (Japan, about 10%) and Osaka (Japan, about 10%).
Same family: Erebidae
The closest relatives of the Ramie Moth that you can see in Tokyo (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are Japanese Nine-Spotted Moth (about 10%), Brown-Striped Semilooper (about 10%) and Geometrical Lines (about 10%), 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 Tokyo (113 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.
