Harmandiola tremulae
In 3 days ~20% in a week ~30%
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 |
With luck
About 10% of wildlife watchers report an Aspen Leaf Gall Midge sighting in Cairngorms National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 260th most-seen of the 300 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
June and August
In those months about 10% of wildlife watchers report an Aspen Leaf Gall Midge in Cairngorms National Park on a given day, against under 5% in July and September–May, the lowest months.
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.
Only Cairngorms National Park, in our data
Cairngorms National Park is the only park on Wallace's Line with enough records to rate Aspen Leaf Gall Midge sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Aspen Leaf Gall Midge is recorded against all the insects logged in Cairngorms National Park (5 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.
