Plagodis alcoolaria
In 3 days ~10% in a week ~20%
Plagodis alcoolaria, the hollow-spotted plagodis, is a moth of the family Geometridae. The species was first described by Achille Guenée in 1857. It is found in eastern and central North America. The wingspan is 26–35 mm. Adults are on wing from the end of March to September.
The larvae feed on various deciduous trees, including basswood, beech, maple and oak. They prefer Betula (birch) species. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Washington | 🇺🇸 United States | |
| 2 | Boston | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Hollow-Spotted Plagodis Moth sighting in Boston on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 1063rd 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 Hollow-Spotted Plagodis Moth in Boston on a given day, so our monthly data shows no clear season.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Hollow-Spotted Plagodis Moth sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Among the best
Of the 2 cities where we can rate Hollow-Spotted Plagodis Moth sightings, Boston ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Washington (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Hollow-Spotted Plagodis Moth is recorded against all the insects logged in Boston (5 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.
