Ischnura perparva
In 3 days ~10%
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 San Francisco on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 577th most-seen of the 737 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 Western Forktail in San Francisco on a given day, so our monthly data shows no clear season.
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.
Among the best
Of the 3 cities where we can rate Western Forktail sightings, San Francisco ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in Portland (United States, under 5%) and Seattle (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 San Francisco (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.
