Stigmella tityrella
In 3 days ~10% in a week ~20%
Stigmella tityrella is a species of moth in the family Nepticulidae. It is found in all of Europe west of Russia. The wingspan is 5–6 mm. The thick erect hairs on the head vertex are ochreous-yellowish. The collar is white. Antennal eyecaps are white. The forewings are shining bronzy-brown with a rather oblique shining golden-silvery fascia beyond middle; apical area beyond this dark bronzy-brown. Hindwings are grey; in male with an expansible pencil of blackish hairs at base of costa.
External image Adults are on wing from April to May and again from July to August. There are two generations per year. The larvae feed on beech (Fagus sylvatica), mining the leaves of their host plant. The mine consists of a corridor that does not widen much and zigzags between two lateral veins in the direction of the leaf margin. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Liverpool | 🇬🇧 United Kingdom | |
| 2 | Birmingham | 🇬🇧 United Kingdom | |
| 3 | London | 🇬🇧 United Kingdom |
Rare
Under 5% of wildlife watchers report a Small Beech Pigmy sighting in Birmingham on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 668th most-seen of the 811 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 October–November
In those months about 10% of wildlife watchers report a Small Beech Pigmy in Birmingham on a given day, against under 5% in April–September and December–February, the lowest months.
2nd of 3
Of the 3 cities where we can rate Small Beech Pigmy sightings, Birmingham ranks 2nd at under 5%. The best odds are in Liverpool (United Kingdom, about 10%).
GBIF citizen-science records
It is estimated from how often the Small Beech Pigmy is recorded against all the insects logged in Birmingham (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.
