Idaea subsericeata
In 3 days ~40% in a week ~70%
Idaea subsericeata, the satin wave, is a moth of the family Geometridae. The species was first described by Adrian Hardy Haworth in 1809. It is found from central and southern Europe, North Africa, Asia Minor to Transcaspia.
The ground colour is white with strong silky gloss, the lines grey, seldom strongly expressed, on the other hand usually all present, thus numbering five on the forewing and four on the hindwing; the outermost line (distal shading of subterminal) the oftenest absent; all except the median are parallel with the distal margin, but slightly wavy; the median on the forewing is usually somewhat oblique, but occasionally almost parallel with the others; that of the hindwing runs straighter across the wing, instead of following the curve of the strongly convex distal margin. Cellspots and terminal line wanting or rarely the former present, minute; fringe usually with a series of minute black dots at the base, which are sometimes in part, more rarely entirely obsolete. Forewing beneath often with a smoky suffusion, either basally or all over; median and postmedian lines present, often well developed; a small discal dot present. Hindwing beneath white,... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cévennes National Park | 🇫🇷 France | |
| 2 | Pyrénées National Park | 🇫🇷 France | |
| 3 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 4 | Wadden Sea National Park | 🇩🇪 Germany |
Possible
About 20% of wildlife watchers report a Satin Wave sighting in Porto on a given day, based on 171 verified sightings from GBIF citizen-science data. It is the 19th most-seen of the 498 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.
September
In that month about 30% of wildlife watchers report a Satin Wave in Porto on a given day, against under 5% in November to March, the lowest months. That is one of Porto's driest months, with about 50 mm of rain against 140 mm in January.
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Satin Wave 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.
Yes
Of the 6 cities where we can rate Satin Wave sightings, Porto has the highest daily chance: about 20%. Next come Rotterdam [The Hague] (Netherlands, about 10%) and Lyon (France, about 10%).
Same genus: Idaea
The closest relatives of the Satin Wave that you can see in Porto (genus Idaea) are Riband Wave (about 20%), Idaea eugeniata (about 10%) and Portland Ribbon Wave (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Satin Wave is recorded against all the insects logged in Porto (171 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.
