Harrisimemna trisignata
In 3 days ~10% in a week ~20%
Harrisimemna trisignata, or Harris's three spot, is a moth of the family Noctuidae. The species was first described by Francis Walker in 1856. It is found in North America from Ontario, Quebec, New Brunswick, Nova Scotia, Newfoundland and Labrador, Alberta and Saskatchewan, south to Arizona. In the United States it has been recorded in Maryland, Pennsylvania, Wisconsin, Georgia, Illinois, Indiana, Iowa, New York, Ohio, Oklahoma, Tennessee, Texas and Virginia.
The wingspan is 30–36 mm. Adults are on wing from May to August in Canada. The larvae feed on various woody plants, including wild raisin, winterberry, bush honeysuckle, black willow, white ash and apple. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Austin | 🇺🇸 United States | |
| 2 | Washington | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Harris's Three-Spot sighting in Austin on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 1254th most-seen of the 1624 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 Harris's Three-Spot in Austin on a given day, so our monthly data shows no clear season.
Yes
Of the 2 cities where we can rate Harris's Three-Spot sightings, Austin has the highest daily chance: under 5%. Next come Washington (United States, under 5%).
Same family: Noctuidae
The closest relatives of the Harris's Three-Spot that you can see in Austin (family Noctuidae, Cutworm Moths and Allies) are Wedgling Moth (about 20%), Harp-Winged Tripudia Moth (about 20%) and Armyworm Moth (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Harris's Three-Spot is recorded against all the insects logged in Austin (8 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.
