Macromia illinoiensis
In 3 days ~10% in a week ~20%
Macromia illinoiensis, also known as the swift river cruiser or the Illinois river cruiser, is a species of dragonfly in the family Macromiidae. It was described by Walsh in 1862. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Montreal | 🇨🇦 Canada | |
| 2 | Washington | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Swift River Cruiser sighting in Montreal on a given day, based on 18 verified sightings from GBIF citizen-science data. It is the 412th 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 a Swift River Cruiser in Montreal on a given day, against under 5% in August to June, the lowest months.
Yes
Of the 2 cities where we can rate Swift River Cruiser sightings, Montreal has the highest daily chance: under 5%. Next come Washington (United States, under 5%).
Same order: Odonata
The closest relatives of the Swift River Cruiser that you can see in Montreal (order Odonata, Dragonflies and Damselflies) are Autumn Meadowhawk (about 10%), Twelve-Spotted Skimmer (about 10%) and Common Whitetail (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Swift River Cruiser is recorded against all the insects logged in Montreal (18 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.
