Catocala lineella
In 3 days ~10% in a week ~20%
Catocala lineella, the lineella underwing, little lined underwing or steely underwing, is a moth of the family Erebidae. The species was first described by Augustus Radcliffe Grote in 1872. It is found in North America from Ontario and Quebec south to Florida west to Texas and north to Ohio.
It was considered to be a subspecies or even a synonym of Catocala amica for a long time. The wingspan is 35–40 mm. Adults are on wing from July to August. The larvae feed on the leaves of Quercus species. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Boston | 🇺🇸 United States | |
| 2 | Toronto | 🇨🇦 Canada | |
| 3 | New York City | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Little Lined Underwing sighting in Boston on a given day, based on 19 verified sightings from GBIF citizen-science data. It is the 512th most-seen of the 1200 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
In that month about 10% of wildlife watchers report a Little Lined Underwing in Boston on a given day, against under 5% in September to July, the lowest months.
Yes
Of the 3 cities where we can rate Little Lined Underwing sightings, Boston has the highest daily chance: under 5%. Next come Toronto (Canada, under 5%) and New York City (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Little Lined Underwing is recorded against all the insects logged in Boston (19 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.
