Ennomos magnaria
In 3 days ~30% in a week ~60%
Ennomos magnaria, the maple spanworm moth, notched wing moth, notched-wing geometer or notch-wing moth, is a moth of the family Geometridae. The species was first described by Achille Guenée in 1858. It is found from coast to coast in southern Canada and the northern United States, south in the east to Florida and Louisiana and in the west to California.
The wingspan is 43–60 mm. Adults resemble an autumn leaf. Adults are on wing from July to early November in one generation per year. Adults are nocturnal and may rest on buildings during the day. The larvae feed on the leaves of Alnus, Fraxinus, Tilia, Betula, Ulmus, Carya, Acer, Quercus, and Populus species. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cape Breton Highlands National Park | 🇨🇦 Canada | |
| 2 | Elk Island National Park | 🇨🇦 Canada |
With luck
About 10% of wildlife watchers report a Maple Spanworm Moth sighting in Cape Breton Highlands National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 34th most-seen of the 68 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.
September
In that month about 40% of wildlife watchers report a Maple Spanworm Moth in Cape Breton Highlands National Park on a given day, against under 5% in February–July and October–December, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Maple Spanworm Moth sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Maple Spanworm Moth sightings, Cape Breton Highlands National Park has the highest daily chance: about 10%. Next come Elk Island National Park (Canada, about 10%).
Same family: Geometridae
The closest relatives of the Maple Spanworm Moth that you can see in Cape Breton Highlands National Park (family Geometridae, Geometer Moths) are Lesser Maple Spanworm Moth (about 20%), Pale Beauty (about 10%) and Curved-Toothed Geometer Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Maple Spanworm Moth is recorded against all the insects logged in Cape Breton Highlands National Park (10 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.
