Thysanoplusia orichalcea
In 3 days ~30% in a week ~50%
Thysanoplusia orichalcea, the slender burnished brass, is a moth of the family Noctuidae. The species was first described by Johan Christian Fabricius in 1775. It is a polyphagous pest of vegetable crops that originated in Indonesia, from where it spread to Europe, South Asia, India, Sri Lanka, Africa, Australia and New Zealand. In northern Europe it is a migrant species.
The wingspan is 36–44 mm. Its head, collar and the vertex of its head are reddish orange. Tegulae and forewings pale reddish brown. The forewings are extensively covered with a metallic golden shimmering surface. Only the costal field and hem are brown. Sub-basal, antemedial and postmedial waved lines very indistinct, fine and whitish in colour. The sub-marginal line irregularly lunulate. The reniform and orbicular stains are small and white bordered. The unpatterned hindwings are grey brown, somewhat darker at the margin. The thorax is furry and with some hair tufts, the proboscis is well developed.
Larva bluish green with a few short dorsal hairs. There are slender dorsal white lines and a prominent lateral line. The moth flies from August to October, depending on the location. The... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Egmont National Park | 🇳🇿 New Zealand | |
| 2 | Kruger National Park | 🇿🇦 South Africa |
With luck
About 10% of wildlife watchers report a Slender Burnished Brass sighting in Porto on a given day, based on 59 verified sightings from GBIF citizen-science data. It is the 91st most-seen of the 498 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
July
In that month about 20% of wildlife watchers report a Slender Burnished Brass in Porto on a given day, against under 5% in November, the lowest month. That is one of Porto's driest months, with about 15 mm of rain against 140 mm in January.
Between 7 and 10 pm
Across all the parks we cover, that three-hour window holds the most Slender Burnished Brass sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is most active around dawn and dusk.
Among the best
Of the 7 cities where we can rate Slender Burnished Brass sightings, Porto ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Pretoria (South Africa, about 10%) and Auckland (New Zealand, about 10%).
Same family: Noctuidae
The closest relatives of the Slender Burnished Brass that you can see in Porto (family Noctuidae, Cutworm Moths and Allies) are Variegated Cutworm Moth (about 20%), Armyworm Moth (about 20%) and Scarce Merveille Du Jour (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Slender Burnished Brass is recorded against all the insects logged in Porto (59 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.
