Heliomata cycladata
In 3 days ~10% in a week ~20%
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 |
Rare
Under 5% of wildlife watchers report a Common Spring Moth sighting in Montreal on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 842nd most-seen of the 926 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 Common Spring Moth in Montreal on a given day, so our monthly data shows no clear season.
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 4 cities where we can rate Common Spring Moth sightings, Montreal ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in Boston (United States, under 5%) and Toronto (Canada, under 5%).
Same family: Geometridae
The closest relatives of the Common Spring Moth that you can see in Montreal (family Geometridae, Geometer Moths) are Lesser Maple Spanworm Moth (about 10%), Pale Beauty (about 10%) and Chickweed Geometer Moth (about 10%), 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 Montreal (5 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.
