Cissusa spadix
In 3 days ~10%
Cissusa spadix, the black-dotted brown moth, is a species of moth in the family Erebidae. The species is found from Ontario and Quebec, south through most of the United States, to Arizona and Georgia. The wingspan is about 35 mm. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Black-Dotted Brown sighting in Chicago on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 751st most-seen of the 978 insects we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Black-Dotted Brown in Chicago on a given day, so our monthly data shows no clear season.
Among the best
Of the 3 cities where we can rate Black-Dotted Brown sightings, Chicago ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in Austin (United States, under 5%) and Dallas (United States, under 5%).
Same family: Erebidae
The closest relatives of the Black-Dotted Brown that you can see in Chicago (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are White-Marked Tussock Moth (about 10%), Green Cloverworm Moth (about 10%) and Isabella Tiger Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Black-Dotted Brown is recorded against all the insects logged in Chicago (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.
