Calopteryx aequabilis
In 3 days ~10% in a week ~20%
Calopteryx aequabilis, the river jewelwing, is a species of broad-winged damselfly. The species was first described by Thomas Say in 1839. It is found from British Columbia to Newfoundland and southward to most of the northern part of the United States. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Riding Mountain National Park | 🇨🇦 Canada | |
| 2 | Yellowstone National Park | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a River Jewelwing sighting in Portland on a given day, based on 30 verified sightings from GBIF citizen-science data. It is the 235th most-seen of the 507 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.
June and July
In those months about 10% of wildlife watchers report a River Jewelwing in Portland on a given day, against under 5% in August to May, the lowest months. Those are among Portland's driest months, with about 35 mm of rain a month against 250 mm in December.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most River Jewelwing sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 cities where we can rate River Jewelwing sightings, Portland has the highest daily chance: under 5%. Next come Seattle (United States, under 5%).
Same order: Odonata
The closest relatives of the River Jewelwing that you can see in Portland (order Odonata, Dragonflies and Damselflies) are Common Whitetail (about 20%), Pacific Forktail (about 20%) and Flame Skimmer (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the River Jewelwing is recorded against all the insects logged in Portland (30 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.
