Chauliodes rastricornis
In 3 days ~10% in a week ~20%
Chauliodes rastricornis, the spring fishfly, is a species of fishfly in the family Corydalidae. It is found in North America. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Point Pelee National Park | 🇨🇦 Canada | |
| 2 | Acadia National Park | 🇺🇸 United States | |
| 3 | Merritt Island National Wildlife Refuge | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 2 | Detroit | 🇺🇸 United States | |
| 3 | Boston | 🇺🇸 United States | |
| 4 | Orlando | 🇺🇸 United States | |
| 5 | Houston | 🇺🇸 United States | |
| 6 | Chicago | 🇺🇸 United States | |
| 7 | Montreal | 🇨🇦 Canada | |
| 8 | New York City | 🇺🇸 United States | |
| 9 | Toronto | 🇨🇦 Canada | |
| 10 | Dallas | 🇺🇸 United States |
No species of the same family or order lives in Chicago, so these are its closest relatives here: other insects.
Rare
Under 5% of wildlife watchers report a Spring Fishfly sighting in Chicago on a given day, based on 32 verified sightings from GBIF citizen-science data. It is the 332nd 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 20%, if each day is a fresh chance.
May and June
In those months about 10% of wildlife watchers report a Spring Fishfly in Chicago on a given day, against under 5% in July to April, the lowest months.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Spring Fishfly sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Among the best
Of the 11 cities where we can rate Spring Fishfly sightings, Chicago ranks 6th at under 5%, level with the leaders once rounded. The best odds are in Minneapolis [Saint Paul] (United States, under 5%), Detroit (United States, under 5%) and Boston (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Spring Fishfly is recorded against all the insects logged in Chicago (32 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.
