Lycia ursaria
In 3 days ~10% in a week ~20%
Lycia ursaria, the stout spanworm moth or bear, is a moth of the family Geometridae. The species was first described by Francis Walker in 1860. It is found in southern Canada and the northern United States, south to New Jersey and Iowa.
The wingspan is about 45 mm. Adults are on wing from March to June in one generation per year. The larvae feed on the leaves of various broadleaved trees and shrubs, including Alnus, Malus, Fraxinus, Tilia, Betula, Vaccinium, Cornus, Ulmus, Crataegus, Populus and Salix. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Edmonton | 🇨🇦 Canada | |
| 2 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 3 | Toronto | 🇨🇦 Canada | |
| 4 | Montreal | 🇨🇦 Canada |
Rare
Under 5% of wildlife watchers report a Stout Spanworm Moth sighting in Edmonton on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 336th most-seen of the 390 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.
April
In that month about 10% of wildlife watchers report a Stout Spanworm Moth in Edmonton on a given day, against under 5% in May to March, the lowest months.
Yes
Of the 4 cities where we can rate Stout Spanworm Moth sightings, Edmonton has the highest daily chance: under 5%. Next come Minneapolis [Saint Paul] (United States, under 5%) and Toronto (Canada, under 5%).
Same family: Geometridae
The closest relatives of the Stout Spanworm Moth that you can see in Edmonton (family Geometridae, Geometer Moths) are Maple Spanworm Moth (about 10%) and Linden Looper Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Stout Spanworm Moth is recorded against all the insects logged in Edmonton (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.
