Acericecis ocellaris
In 3 days ~30% in a week ~60%
Acericecis ocellaris, known generally as ocellate gall midge, is a species of gall midge in the family Cecidomyiidae. Other common names include the maple eyespot gall and maple leaf spot gall. This species induces blister-like galls on the leaves of maples in the Nearctic, including Acer circinatum, A. pensylvanicum, A. rubrum, A. saccharinum, A. saccharum, and A. spicatum.
The species was first described by Carl Robert Osten-Sacken in 1862 as Cecidomyia ocellaris. It is the type species of the genus. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 2 | Gros Morne National Park | 🇨🇦 Canada | |
| 3 | Acadia National Park | 🇺🇸 United States | |
| 4 | Shenandoah National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Washington | 🇺🇸 United States | |
| 2 | Boston | 🇺🇸 United States | |
| 3 | Philadelphia | 🇺🇸 United States | |
| 4 | New York City | 🇺🇸 United States | |
| 5 | Minneapolis [Saint Paul] | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report an Ocellate Gall Midge sighting in Gros Morne National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 46th most-seen of the 83 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
July
In that month about 20% of wildlife watchers report an Ocellate Gall Midge in Gros Morne National Park on a given day, against under 5% in August to May, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Ocellate 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 4 parks where we can rate Ocellate Gall Midge sightings, Gros Morne National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Great Smoky Mountains National Park (United States, about 10%).
Same order: Diptera
The closest relatives of the Ocellate Gall Midge that you can see in Gros Morne National Park (order Diptera, Flies) are Melanostoma mellina (about 10%), Phytomyza ranunculi (about 10%) and Common Snipe Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Ocellate Gall Midge is recorded against all the insects logged in Gros Morne 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.
