Ennomos subsignaria
In 3 days ~10%
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 Houston on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 905th most-seen of the 1057 insects we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report an Elm Spanworm Moth in Houston on a given day, so our monthly data shows no clear season.
Among the best
Of the 8 cities where we can rate Elm Spanworm Moth sightings, Houston ranks 8th 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%).
Same family: Geometridae
The closest relatives of the Elm Spanworm Moth that you can see in Houston (family Geometridae, Geometer Moths) are Pannaria Wave (about 10%), White-Tipped Black (about 10%) and Southern Emerald (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Elm Spanworm Moth is recorded against all the insects logged in Houston (6 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.
