Ischnura posita
In 3 days ~10% in a week ~30%
Ischnura posita, the fragile forktail, is a species of damselfly in the genus Ischnura. It is 21 to 29 millimetres (0.83 to 1.14 in) long. It is native to most all of eastern North America. The shoulder stripes of both sexes resemble exclamation marks. It is one of the more common damselflies on the east coast of the US. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Biotopo Cerro Cahuí | 🇬🇹 Guatemala | |
| 2 | Point Pelee National Park | 🇨🇦 Canada | |
| 3 | Shenandoah National Park | 🇺🇸 United States | |
| 4 | Congaree National Park | 🇺🇸 United States | |
| 5 | Big Cypress National Preserve | 🇺🇸 United States | |
| 6 | Merritt Island National Wildlife Refuge | 🇺🇸 United States | |
| 7 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 8 | Acadia National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Washington | 🇺🇸 United States | |
| 2 | Boston | 🇺🇸 United States | |
| 3 | New York City | 🇺🇸 United States | |
| 4 | Houston | 🇺🇸 United States | |
| 5 | Philadelphia | 🇺🇸 United States | |
| 6 | Baltimore | 🇺🇸 United States | |
| 7 | Austin | 🇺🇸 United States | |
| 8 | Dallas | 🇺🇸 United States | |
| 9 | Orlando | 🇺🇸 United States | |
| 10 | Toronto | 🇨🇦 Canada |
Rare
Under 5% of wildlife watchers report a Fragile Forktail sighting in Chicago on a given day, based on 61 verified sightings from GBIF citizen-science data. It is the 221st most-seen of the 978 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.
August
In that month about 10% of wildlife watchers report a Fragile Forktail in Chicago on a given day, against under 5% in September to July, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Fragile 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.
11th of 14
Of the 14 cities where we can rate Fragile Forktail sightings, Chicago ranks 11th at under 5%. The best odds are in Washington (United States, about 10%), Boston (United States, about 10%) and New York City (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Fragile Forktail is recorded against all the insects logged in Chicago (61 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.
