Macromia illinoiensis
In 3 days ~10%
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 Washington on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 1424th most-seen of the 1807 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 a Swift River Cruiser in Washington on a given day, so our monthly data shows no clear season.
Among the best
Of the 2 cities where we can rate Swift River Cruiser sightings, Washington ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Montreal (Canada, under 5%).
Same order: Odonata
The closest relatives of the Swift River Cruiser that you can see in Washington (order Odonata, Dragonflies and Damselflies) are Common Whitetail (about 20%), Blue Dasher (about 20%) and Fragile Forktail (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 Washington (7 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.
