Eurois occulta
In 3 days ~10% in a week ~30%
Eurois occulta, the great brocade or great gray dart, is a moth of the family Noctuidae. It is found in northern and central Europe, North Asia and central Asia to the Pacific Ocean and Japan. Also the northern parts of North America (coast to coast in Canada, south in east to Virginia and the Great Lakes states) ( a Holarctic distribution). In addition, it is found in Greenland and Iceland. In the south in northern Spain and on the Balkan Peninsula. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Novosibirsk | 🇷🇺 Russia | |
| 2 | Helsinki | 🇫🇮 Finland | |
| 3 | Montreal | 🇨🇦 Canada | |
| 4 | Moscow | 🇷🇺 Russia |
Rare
Under 5% of wildlife watchers report a Great Brocade sighting in Helsinki on a given day, based on 13 verified sightings from GBIF citizen-science data. It is the 413th 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 30%, if each day is a fresh chance.
July and August
In those months about 10% of wildlife watchers report a Great Brocade in Helsinki on a given day, against under 5% in September to June, the lowest months.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Great Brocade sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 4 cities where we can rate Great Brocade sightings, Helsinki ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Novosibirsk (Russia, under 5%).
Same family: Noctuidae
The closest relatives of the Great Brocade that you can see in Helsinki (family Noctuidae, Cutworm Moths and Allies) are Large Yellow Underwing (about 10%), Silver Υ (about 10%) and Antler Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Great Brocade is recorded against all the insects logged in Helsinki (13 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.
