Swammerdamia pyrella
In 3 days ~10% in a week ~20%
Swammerdamia pyrella is a moth of the family Yponomeutidae. It is found in Europe, North America and Japan. The wingspan is 10–13 mm. The head is white or whitish ochreous. Thorax is dark fuscous, whitish-sprinkled. Forewings are fuscous, faintly purplish-tinged, closely irrorated with dark fuscous, and irregularly sprinkled with whitish; a dark purplish fuscous entire fascia before middle; a whitish anteapical costal spot; cilia dark coppery - fuscous. Hindwings are grey. The larva is pale yellow; subdorsal line dark red-brown; 4-12 with pale brown anterior bands; head brown, sides blackish.
The moth flies in two generations from late April to August.[1]. The larvae feed on Crataegus, apple, pear and cherry. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bavarian Forest National Park | 🇩🇪 Germany |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Little Ermel sighting in London on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 1153rd most-seen of the 1504 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Little Ermel in London on a given day, so our monthly data shows no clear season.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Little Ermel sightings with a recorded time, and nearly all of them come between 6 pm and 6 am: it is mostly seen at night.
2nd of 2
Of the 2 cities where we can rate Little Ermel sightings, London ranks 2nd at under 5%. The best odds are in Liverpool (United Kingdom, about 10%).
Same family: Yponomeutidae
The closest relatives of the Little Ermel that you can see in London (family Yponomeutidae, Ermine Moths) are Bird-Cherry Ermine (about 10%), Hawthorn Moth (about 10%) and Spindle Ermine Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Little Ermel is recorded against all the insects logged in London (8 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.
