Acraspis erinacei
In 3 days ~10% in a week ~20%
Acraspis erinacei, the hedgehog gall wasp, is a species of gall wasp in the family Cynipidae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Chicago | 🇺🇸 United States | |
| 2 | New York City | 🇺🇸 United States | |
| 3 | Boston | 🇺🇸 United States | |
| 4 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 5 | Toronto | 🇨🇦 Canada |
Rare
Under 5% of wildlife watchers report a Hedgehog Gall Wasp sighting in Boston on a given day, based on 13 verified sightings from GBIF citizen-science data. It is the 640th most-seen of the 1200 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Hedgehog Gall Wasp in Boston on a given day, so our monthly data shows no clear season.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Hedgehog Gall Wasp 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 Hedgehog Gall Wasp sightings, Boston ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in Chicago (United States, under 5%) and New York City (United States, under 5%).
Same family: Cynipidae
The closest relatives of the Hedgehog Gall Wasp that you can see in Boston (family Cynipidae, Gall Wasps) are Round Bullet Gall Wasp (about 10%), Succulent Oak Gall Wasp (about 10%) and Philonix fulvicollis (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Hedgehog Gall Wasp is recorded against all the insects logged in Boston (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.
