Thetidia plusiaria
In 3 days ~30% in a week ~50%
Thetidia plusiaria is a moth of the family Geometridae. It is found in central and eastern Spain, the Pyrenees, on Mallorca, as well as in Algeria and Morocco. In the mountains, it is found up to altitudes of about 2,400 meters.
The wingspan is 22–27 mm. There are two generations per year with adults on wing in June and July and again in September. If conditions are favourable, a third generation may occur. The larvae feed on Santolina, Achillea and Artemisia species. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sierra Nevada National Park | 🇪🇸 Spain |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Thetidia plusiaria sighting in Sierra Nevada National Park on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 282nd most-seen of the 479 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.
May and September
In those months about 20% of wildlife watchers report a Thetidia plusiaria in Sierra Nevada National Park on a given day, against under 5% in July–August and October–March, the lowest months.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Thetidia plusiaria sightings with a recorded time, and about 9 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Only Sierra Nevada National Park, in our data
Sierra Nevada National Park is the only park on Wallace's Line with enough records to rate Thetidia plusiaria sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Geometridae
The closest relatives of the Thetidia plusiaria that you can see in Sierra Nevada National Park (family Geometridae, Geometer Moths) are Vestal (about 20%), Idaea sericeata (about 20%) and Yellow Shell Moth (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Thetidia plusiaria is recorded against all the insects logged in Sierra Nevada National Park (11 verified sightings from 2019 to 2026), 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.
