Catocala blandula
In 3 days ~10% in a week ~20%
Catocala blandula, the charming underwing, is a moth of the family Erebidae. The species was first described by George Duryea Hulst in 1884. It is found in North America from Nova Scotia west to central Alberta, south to Pennsylvania and Wisconsin.
The wingspan is 42–50 mm. Adults are on wing from July to September depending on the location. The larvae feed on Amelanchier, Malus sylvestris and Crataegus. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Charming Underwing sighting in Calgary on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 193rd 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Charming Underwing in Calgary on a given day, so our monthly data shows no clear season.
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Charming Underwing sightings with a recorded time, and nearly all of them come between 6 pm and 6 am: it is mostly seen at night.
Among the best
Of the 3 cities where we can rate Charming Underwing sightings, Calgary ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Edmonton (Canada, under 5%).
GBIF citizen-science records
It is estimated from how often the Charming Underwing is recorded against all the insects logged in Calgary (7 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.
