Catocala parta
In 3 days ~10% in a week ~20%
Catocala parta, the mother underwing, is a moth of the family Erebidae. The species was first described by Achille Guenée in 1852. It is found in North America from Nova Scotia south to Maryland and Kentucky, west to southern Saskatchewan and Alberta, western Montana, and Utah.
The wingspan is 70–78 mm. Adults are on wing from August to September depending on the location. The larvae feed on Populus and Salix species. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 2 | Chicago | 🇺🇸 United States | |
| 3 | Montreal | 🇨🇦 Canada | |
| 4 | Boston | 🇺🇸 United States | |
| 5 | Toronto | 🇨🇦 Canada | |
| 6 | New York City | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Mother Underwing Moth sighting in Chicago on a given day, based on 41 verified sightings from GBIF citizen-science data. It is the 303rd most-seen of the 978 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.
August and September
In those months about 10% of wildlife watchers report a Mother Underwing Moth in Chicago on a given day, against under 5% in October to July, the lowest months.
Among the best
Of the 6 cities where we can rate Mother Underwing Moth sightings, Chicago ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Minneapolis [Saint Paul] (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Mother Underwing Moth is recorded against all the insects logged in Chicago (41 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.
