Dichomeris ustalella
In 3 days ~10% in a week ~30%
Dichomeris ustalella is a moth in the family Gelechiidae. It is found in south-eastern Siberia, the Caucasus, Transcaucasia, Korea, Japan, China (Zhejiang, Jiangxi, Yunnan) and Europe, where it has been recorded from most of the continent, except for Ireland, the Iberian Peninsula and Scandinavia.
The wingspan is 15–20 mm (0.59–0.79 in). Adults are on wing in May and June. The larvae feed on Tilia cordata, Corylus heterophylla var. thunbergii, Betula, Carpinus and Acer species, as well as Fagus silvatica and Quercus serrata. They feed from in between leaves spun together. Pupation takes places amongst detritus on the ground. 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 Worcester Crest sighting in Bavarian Forest National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 822nd most-seen of the 1115 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.
May and June
In those months about 10% of wildlife watchers report a Worcester Crest in Bavarian Forest National Park on a given day, against under 5% in July to April, the lowest months.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Worcester Crest sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Only Bavarian Forest National Park, in our data
Bavarian Forest National Park is the only park on Wallace's Line with enough records to rate Worcester Crest sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Gelechiidae
The closest relatives of the Worcester Crest that you can see in Bavarian Forest National Park (family Gelechiidae, Twirler Moths) are Helcystogramma lutatella (about 10%), Ash-Coloured Crest (about 10%) and Argolamprotes micella (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Worcester Crest is recorded against all the insects logged in Bavarian Forest National Park (7 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.
