Cyclophora pendulinaria
In 3 days ~10% in a week ~20%
Cyclophora pendulinaria, the sweetfern geometer moth or pearly-grey wave, is a moth in the family Geometridae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Acadia National Park | 🇺🇸 United States | |
| 2 | Gros Morne National Park | 🇨🇦 Canada | |
| 3 | Great Bear Rainforest | 🇨🇦 Canada |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Montreal | 🇨🇦 Canada | |
| 2 | New York City | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Sweetfern Geometer Moth sighting in Montreal on a given day, based on 20 verified sightings from GBIF citizen-science data. It is the 396th most-seen of the 926 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 Sweetfern Geometer Moth in Montreal on a given day, so our monthly data shows no clear season.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Sweetfern Geometer Moth sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Yes
Of the 2 cities where we can rate Sweetfern Geometer Moth sightings, Montreal has the highest daily chance: under 5%. Next come New York City (United States, under 5%).
Same family: Geometridae
The closest relatives of the Sweetfern Geometer Moth that you can see in Montreal (family Geometridae, Geometer Moths) are Lesser Maple Spanworm Moth (about 10%), Pale Beauty (about 10%) and Chickweed Geometer Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Sweetfern Geometer Moth is recorded against all the insects logged in Montreal (20 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.
