Bryotropha terrella
In 3 days ~10% in a week ~30%
Bryotropha terrella is a moth of the family Gelechiidae. It is the type species of the genus Bryotropha. It is found in Europe. The wingspan is 14–16 mm. Forewings very variable in ground colour - dark fuscous, shades of brown and grey to cream (coastal form), dark shining bronzy base of costa purplish-tinged. Variously showing the ‘bryotropha’ spots, a sub-terminal fascia and spots around the wing tip or unicolorous. Hindwings grey. Certain identification is by miscroscopic examination of the genitalia.
The moths are on wing from May to August depending on the location. The larvae feed on various mosses and grasses, including Rhytidiadelphus squarrosus, Syntrichia ruraliformis, Hypnum jutlandicum, Calliergonella cuspidata and Agrostis capillaris. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 2 | Bavarian Forest National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Liverpool | 🇬🇧 United Kingdom | |
| 2 | London | 🇬🇧 United Kingdom | |
| 3 | Birmingham | 🇬🇧 United Kingdom |
With luck
About 10% of wildlife watchers report a Cinerous Neb 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 727th 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.
August
In that month about 10% of wildlife watchers report a Cinerous Neb in Bavarian Forest National Park on a given day, against under 5% in September to July, the lowest months.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Cinerous Neb sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Among the best
Of the 2 parks where we can rate Cinerous Neb sightings, Bavarian Forest National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Snowdonia National Park (United Kingdom, about 10%).
Same family: Gelechiidae
The closest relatives of the Cinerous Neb 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 Cinerous Neb 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.
