Ercheia cyllaria
In 3 days ~10% in a week ~20%
Ercheia cyllaria is a species of moth of the family Erebidae first described by Pieter Cramer in 1779. It is found in the Indian subregion, Sri Lanka, Taiwan, Japan, Indochina, Thailand, Peninsular Malaysia, Sumatra, Borneo, Seram and the Kai Islands.
Its head, thorax and forewings are pale reddish brown. The collar and patagia are often streaked with black. Forewings with indistinct, waved antemedial line and a very much excurved postmedial line beyond the cell. A waved sub-marginal line is present. Orbicular is a speck and reniform is indistinctly dark outlined. Abdomen and hindwings fuscous black. Hindwings with three medial white spots, which may be disconnected and the costal spot obsolescent or conjoined into a band. A spot near center of outer margin. Cilia white at apex and outer angle. Ventral side ochreous white, irrorated (sprinkled) with black. Forewings with oblique crenulate postmedial line and broad sub-marginal diffused band. Hindwings similar, but with a lunule at end of cell and the line more irregular. Colours and spots can vary in subspecies.
The larvae feed on Asparagus, Brassica, Dalbergia and Grewia species. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report an Ercheia cyllaria sighting in Hong Kong on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 778th 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 20%, if each day is a fresh chance.
October and November
In those months about 10% of wildlife watchers report an Ercheia cyllaria in Hong Kong on a given day, against under 5% in December to September, the lowest months. Those are among Hong Kong's driest months, with about 40 mm of rain a month against 280 mm in June.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Ercheia cyllaria sightings with a recorded time, and about 8 in 10 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 Ercheia cyllaria sightings, Hong Kong ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in Chennai (India, under 5%) and Kochi (India, under 5%).
Same family: Erebidae
The closest relatives of the Ercheia cyllaria that you can see in Hong Kong (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are Banyan Tussock Moth (about 20%), Orvasca subnotata (about 20%) and Zhejiang Tussock Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Ercheia cyllaria is recorded against all the insects logged in Hong Kong (9 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.
