Rivula propinqualis
In 3 days ~10% in a week ~20%
Rivula propinqualis, the spotted grass moth or yellow snout-moth, is a moth of the family Erebidae. The species was first described by Achille Guenée in 1854. It is found throughout eastern North America from southern Canada southward to Florida and Texas and westward in the north to British Columbia and Washington. In North Carolina it is found from the Appalachian Mountains to the Atlantic coast.
The wingspan is 15–19 mm. Adults are on wing from May to August. The larvae feed on various grasses. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Baltimore | 🇺🇸 United States | |
| 2 | Washington | 🇺🇸 United States | |
| 3 | Toronto | 🇨🇦 Canada | |
| 4 | Chicago | 🇺🇸 United States | |
| 5 | Montreal | 🇨🇦 Canada | |
| 6 | Dallas | 🇺🇸 United States | |
| 7 | New York City | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Spotted Grass Moth sighting in Toronto on a given day, based on 27 verified sightings from GBIF citizen-science data. It is the 557th most-seen of the 1689 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 Spotted Grass Moth in Toronto on a given day, so our monthly data shows no clear season.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Spotted Grass Moth sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Among the best
Of the 7 cities where we can rate Spotted Grass Moth sightings, Toronto ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in Baltimore (United States, under 5%) and Washington (United States, under 5%).
Same family: Erebidae
The closest relatives of the Spotted Grass Moth that you can see in Toronto (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are Spongy Moth (about 20%), Hickory Tussock Moth (about 10%) and Isabella Tiger Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Spotted Grass Moth is recorded against all the insects logged in Toronto (27 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.
