Ennomos magnaria
In 3 days ~10% in a week ~20%
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 |
Rare
Under 5% of wildlife watchers report a Maple Spanworm Moth sighting in Calgary on a given day, based on 11 verified sightings from GBIF citizen-science data. It is the 149th most-seen of the 256 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.
September
In that month about 10% of wildlife watchers report a Maple Spanworm Moth in Calgary on a given day, against under 5% in October to August, 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.
4th of 7
Of the 7 cities where we can rate Maple Spanworm Moth sightings, Calgary ranks 4th at under 5%. The best odds are in Edmonton (Canada, about 10%), Detroit (United States, under 5%) and Montreal (Canada, under 5%).
GBIF citizen-science records
It is estimated from how often the Maple Spanworm Moth is recorded against all the insects logged in Calgary (11 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.
