Harmandiola tremulae
In 3 days ~10% in a week ~20%
Harmandiola tremulae, the aspen leaf gall midge, is a species of gall midge in the family Cecidomyiidae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cairngorms National Park | 🇬🇧 United Kingdom |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Helsinki | 🇫🇮 Finland | |
| 2 | Saint Petersburg | 🇷🇺 Russia |
Rare
Under 5% of wildlife watchers report an Aspen Leaf Gall Midge sighting in Saint Petersburg on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 248th most-seen of the 448 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 an Aspen Leaf Gall Midge in Saint Petersburg on a given day, against under 5% in September to July, the lowest months. That is one of Saint Petersburg's wettest months, with about 100 mm of rain against 40 mm in February.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Aspen Leaf Gall Midge 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 2 cities where we can rate Aspen Leaf Gall Midge sightings, Saint Petersburg ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Helsinki (Finland, under 5%).
GBIF citizen-science records
It is estimated from how often the Aspen Leaf Gall Midge is recorded against all the insects logged in Saint Petersburg (9 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.
