Ennomos subsignaria
In 3 days ~10% in a week ~20%
Ennomos subsignaria, the elm spanworm moth, is a moth of the family Geometridae. The species was first described by Jacob Hübner in 1823. It is found in North America from Texas (south) to Alberta (northwest) and east to the Atlantic coast. It is recorded infrequently in Great Britain through accidental importation in asparagus.
The wingspan is 35–40 mm. They are on wing from late May to August. one generation per year. The larvae feed on elm, apple, birch, maple, and oak. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 2 | Toronto | 🇨🇦 Canada | |
| 3 | Chicago | 🇺🇸 United States | |
| 4 | Boston | 🇺🇸 United States | |
| 5 | Montreal | 🇨🇦 Canada | |
| 6 | Austin | 🇺🇸 United States | |
| 7 | New York City | 🇺🇸 United States | |
| 8 | Houston | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report an Elm Spanworm Moth sighting in Montreal on a given day, based on 16 verified sightings from GBIF citizen-science data. It is the 431st 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.
July
In that month about 10% of wildlife watchers report an Elm Spanworm Moth in Montreal on a given day, against under 5% in August to June, the lowest months.
Among the best
Of the 8 cities where we can rate Elm Spanworm Moth sightings, Montreal ranks 5th at under 5%, level with the leaders once rounded. The best odds are in Minneapolis [Saint Paul] (United States, under 5%), Toronto (Canada, under 5%) and Chicago (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Elm Spanworm Moth is recorded against all the insects logged in Montreal (16 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.
