Heliomata cycladata
In 3 days ~10% in a week ~30%
Heliomata cycladata, the common spring moth, is a moth of the family Geometridae. The species was first described by Augustus Radcliffe Grote and Coleman Townsend Robinson in 1866. It is found in eastern North America, with records from southern Ontario, southern Quebec, Maine, New Hampshire, Michigan, Wisconsin to South Carolina, Georgia, Alabama, northern Mississippi and Arkansas.
The wingspan is about 20 mm. Adults are on wing from March to July. The larvae feed on Robinia pseudoacacia and Gleditsia triacanthos. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States | |
| 2 | Great Smoky Mountains National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Boston | 🇺🇸 United States | |
| 2 | Toronto | 🇨🇦 Canada | |
| 3 | Montreal | 🇨🇦 Canada | |
| 4 | New York City | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Common Spring Moth sighting in Great Smoky Mountains National Park on a given day, based on 13 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 379th most-seen of the 822 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
April and May
In those months about 10% of wildlife watchers report a Common Spring Moth in Great Smoky Mountains National Park on a given day, against under 5% in June to March, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Common Spring Moth sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 2 parks where we can rate Common Spring Moth sightings, Great Smoky Mountains National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Shenandoah National Park (United States, about 10%).
Same family: Geometridae
The closest relatives of the Common Spring Moth that you can see in Great Smoky Mountains National Park (family Geometridae, Geometer Moths) are Tulip-Tree Beauty (about 30%), White-Striped Black (about 20%) and Pale Beauty (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Common Spring Moth is recorded against all the insects logged in Great Smoky Mountains National Park (13 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.
