Acericecis ocellaris
In 3 days ~10% in a week ~20%
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 |
Rare
Under 5% of wildlife watchers report an Ocellate Gall Midge sighting in New York City on a given day, based on 37 verified sightings from GBIF citizen-science data. It is the 459th most-seen of the 1623 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.
May
In that month about 10% of wildlife watchers report an Ocellate Gall Midge in New York City on a given day, against under 5% in June to April, 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 5 cities where we can rate Ocellate Gall Midge sightings, New York City ranks 4th at under 5%, level with the leaders once rounded. The best odds are in Washington (United States, under 5%), Boston (United States, under 5%) and Philadelphia (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Ocellate Gall Midge is recorded against all the insects logged in New York City (37 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.
