Assara terebrella
In 3 days ~10% in a week ~20%
Assara terebrella is a moth of the family Pyralidae. It is found in Europe, Korea, Japan (Hokkaido), and eastern Siberia. The wingspan is 21–24 mm. The moth flies from May to September, depending on the location. The larvae feed on Norway spruce. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Vanoise National Park | 🇫🇷 France | |
| 2 | Bavarian Forest National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Helsinki | 🇫🇮 Finland |
Rare
Under 5% of wildlife watchers report a Dark Spruce Knot-Horn sighting in Helsinki on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 732nd 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.
August
In that month about 10% of wildlife watchers report a Dark Spruce Knot-Horn in Helsinki on a given day, against under 5% in September to July, the lowest months.
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Dark Spruce Knot-Horn sightings with a recorded time, and about 8 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Only Helsinki, in our data
Helsinki is the only city on Wallace's Line with enough records to rate Dark Spruce Knot-Horn sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Pyralidae
The closest relatives of the Dark Spruce Knot-Horn that you can see in Helsinki (family Pyralidae, Pyralid Snout Moths) are Bee Moth (about 10%), Large Tabby (about 10%) and Clover Hayworm Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Dark Spruce Knot-Horn is recorded against all the insects logged in Helsinki (5 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.
