Semioscopis avellanella
In 3 days ~10% in a week ~20%
Semioscopis avellanella is a species of moth of the family Depressariidae. It is found in most of Europe (except most of the Balkan Peninsula and the Iberian Peninsula ) east to the eastern parts of the Palearctic realm.
The wingspan is 20–26 mm. The forewings are rosy-grey whitish, sprinkled with pale fuscous; a dark fuscous streak from base along fold to 1/3, thence bent upwards to disc before middle; second discal stigma forming a dark fuscous angulated mark; some dark fuscous scales tending to form dots on costa and termen; 2 and 3 separate. Hindwings are pale greyish. The larva is whitish-green; dorsal line darker; head and plate of 2 green.
Adults are on wing from March to April. The larvae feed on Betula, Tilia (including Tilia cordata) and Carpinus species. Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Semioscopis avellanella sighting in Helsinki on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 665th most-seen of the 838 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
March and April
In those months about 10% of wildlife watchers report a Semioscopis avellanella in Helsinki on a given day, against under 5% in May to February, the lowest months.
Yes
Of the 2 cities where we can rate Semioscopis avellanella sightings, Helsinki has the highest daily chance: under 5%. Next come Moscow (Russia, under 5%).
GBIF citizen-science records
It is estimated from how often the Semioscopis avellanella is recorded against all the insects logged in Helsinki (6 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.
