Trigonodes hyppasia
In 3 days ~10% in a week ~30%
Trigonodes hyppasia, the triangles or semi-looper, is a moth in the family Erebidae. The species was first described by Pieter Cramer in 1779. It is largely cosmopolitan, found throughout Borneo, Fiji, India, Maldives, Nepal, Sri Lanka, São Tomé and Príncipe, Taiwan, Thailand, Zimbabwe, northern Australia, and almost all African countries.
The moth family Noctuidae are mostly classified in the family Erebidae now, along with all of the former members of the families Arctiidae and Lymantriidae. This re-classification has not yet met with general consensus, and many resources and publications still follow the older classification scheme.
The wingspan is about 30–46 mm. Antennae of male ciliated. Mid and hind tibia hairy. Body pale ochreous brown, slightly suffused with fuscous or dark grey brown. Forewings with a large black white-edged triangular patch easily distinguished below the cell from near base to towards outer angle. A similar smaller patch found beyond the cell on vein 5, with some pale fulvous behind it. A slightly sinuous submarginal pale line with patches of black suffusion found inside it and a series of black specks beyond it. A dark marginal... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kanha National Park | 🇮🇳 India | |
| 2 | Lamington National Park | 🇦🇺 Australia | |
| 3 | Kruger National Park | 🇿🇦 South Africa | |
| 4 | Daintree National Park | 🇦🇺 Australia | |
| 5 | Springbrook National Park | 🇦🇺 Australia | |
| 6 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 7 | iSimangaliso Wetland Park | 🇿🇦 South Africa |
Rare
Under 5% of wildlife watchers report a Triangles sighting in Singapore on a given day, based on 67 verified sightings from GBIF citizen-science data. It is the 319th most-seen of the 1045 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.
May–July and September–December
In those months about 10% of wildlife watchers report a Triangles in Singapore on a given day, against under 5% in January–April and August, the lowest months.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Triangles sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
6th of 13
Of the 13 cities where we can rate Triangles sightings, Singapore ranks 6th at under 5%. The best odds are in Naha (Japan, about 20%), New Delhi (India, about 10%) and Hyderabad (India, about 10%).
Same family: Erebidae
The closest relatives of the Triangles that you can see in Singapore (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are Hübner's Wasp Moth (about 30%), Triangular-Striped Moth (about 10%) and Erebus ephesperis (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Triangles is recorded against all the insects logged in Singapore (67 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.
