Sumitrosis inaequalis
In 3 days ~20% in a week ~40%
Sumitrosis inaequalis is a species of leaf beetle in the family Chrysomelidae. It is found in Central America and North America, where it has been recorded from Canada (Alberta, British Columbia, Manitoba, New Brunswick, Nova Scotia, Ontario, Quebec, Prince Edward Island, Saskatchewan) and the United States (Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, New Hampshire, New Jersey, New York, North Carolina, Ohio, Oklahoma, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Utah, Vermont, Virginia, West Virginia, Wisconsin, Wyoming).
Adults reach a length of about 3.4-4.2 mm. Adults are very variable in colour. The pronotum might be pale or maculate with piceous. The elytra range from pale yellow with faint black markings to black with faint yellow spots.
The species is a leaf miner on hosts such as Eurybia divaricata, Symphyotrichum cordifolium, and Ambrosia artemisiifolia. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 2 | Shenandoah National Park | 🇺🇸 United States | |
| 3 | Acadia National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Boston | 🇺🇸 United States | |
| 2 | Montreal | 🇨🇦 Canada | |
| 3 | Toronto | 🇨🇦 Canada | |
| 4 | Washington | 🇺🇸 United States | |
| 5 | Philadelphia | 🇺🇸 United States | |
| 6 | Austin | 🇺🇸 United States | |
| 7 | New York City | 🇺🇸 United States | |
| 8 | Dallas | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Sumitrosis inaequalis sighting in Shenandoah National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 325th most-seen of the 723 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
May–June and September
In those months about 10% of wildlife watchers report a Sumitrosis inaequalis in Shenandoah National Park on a given day, against under 5% in July–August and October–April, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Sumitrosis inaequalis sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 3 parks where we can rate Sumitrosis inaequalis sightings, Shenandoah National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Great Smoky Mountains National Park (United States, about 10%).
Same family: Chrysomelidae
The closest relatives of the Sumitrosis inaequalis that you can see in Shenandoah National Park (family Chrysomelidae, Leaf Beetles) are Larger Elm Leaf Beetle (about 30%), Dogbane Leaf Beetle (about 20%) and Spotted Cucumber Beetle (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Sumitrosis inaequalis is recorded against all the insects logged in Shenandoah National Park (12 verified sightings from 2019 to 2026), 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.
