Clostera albosigma
In 3 days ~10% in a week ~20%
Clostera albosigma, the sigmoid prominent, is a moth of the family Notodontidae. The species was first described by Asa Fitch in 1856. It is found in North America from Newfoundland west to Vancouver Island, north to the Great Slave Lake and the Northwest Territories and south to at least Missouri.
The wingspan is 28–38 mm. The moth flies from May to August depending on the location. The larvae feed on poplar and willow. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Elk Island National Park | 🇨🇦 Canada | |
| 2 | Acadia National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Edmonton | 🇨🇦 Canada |
Rare
Under 5% of wildlife watchers report a Sigmoid Prominent sighting in Edmonton on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 251st most-seen of the 390 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.
July
In that month about 10% of wildlife watchers report a Sigmoid Prominent in Edmonton on a given day, against under 5% in August to June, the lowest months. That is one of Edmonton's wettest months, with about 95 mm of rain against 20 mm in February.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Sigmoid Prominent 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.
Only Edmonton, in our data
Edmonton is the only city on Wallace's Line with enough records to rate Sigmoid Prominent sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Sigmoid Prominent is recorded against all the insects logged in Edmonton (9 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.
