Ischnura perparva
In 3 days ~10% in a week ~30%
Ischnura perparva, the western forktail, is a species of narrow-winged damselfly in the family Coenagrionidae. It is found in North America. The IUCN conservation status of Ischnura perparva is "LC", least concern, with no immediate threat to the species' survival. The population is stable. The IUCN status was reviewed in 2017.
Ischnura perparva is most closely related to I. cervula, and belongs to a clade of damselflies that also includes I. verticalis, I. posita, I. damula, and I. demorsa. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Redwood National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Portland | 🇺🇸 United States | |
| 2 | Seattle | 🇺🇸 United States | |
| 3 | San Francisco | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Western Forktail sighting in Portland on a given day, based on 31 verified sightings from GBIF citizen-science data. It is the 177th 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 30%, if each day is a fresh chance.
May to August
In those months about 10% of wildlife watchers report a Western Forktail in Portland on a given day, against under 5% in September to April, the lowest months. Those are among Portland's driest months, with about 40 mm of rain a month against 250 mm in December.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Western Forktail sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 3 cities where we can rate Western Forktail sightings, Portland has the highest daily chance: under 5%. Next come Seattle (United States, under 5%) and San Francisco (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Western Forktail is recorded against all the insects logged in Portland (31 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.
