Cymatophorina diluta
In 3 days ~10% in a week ~30%
Cymatophorina is a monotypic moth genus of the family Drepanidae first described by Arnold Spuler in 1908. Its only species, Cymatophorina diluta, the oak lutestring or lesser lutestring, was described by Michael Denis and Ignaz Schiffermüller in 1775. It is found in much of Europe, with subspecies Cymatophorina diluta hartwiegi occurring in Britain.
The wingspan is 33–36 mm. The species is univoltine. Adults are on wing between late July and early October, depending on location. Subspecies Cymatophorina diluta hartwiegi flies in August and September. The larvae feed on the leaves of oak trees. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sierra de Guadarrama National Park | 🇪🇸 Spain |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | London | 🇬🇧 United Kingdom |
Rare
Under 5% of wildlife watchers report an Oak Lutestring sighting in Sierra de Guadarrama National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 354th most-seen of the 597 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.
October
In that month about 20% of wildlife watchers report an Oak Lutestring in Sierra de Guadarrama National Park on a given day, against under 5% in November to September, the lowest months.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Oak Lutestring sightings with a recorded time, and nearly all of them come between 6 pm and 6 am: it is mostly seen at night.
Only Sierra de Guadarrama National Park, in our data
Sierra de Guadarrama National Park is the only park on Wallace's Line with enough records to rate Oak Lutestring sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Oak Lutestring is recorded against all the insects logged in Sierra de Guadarrama National Park (10 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.
