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 |
Rare
Under 5% of wildlife watchers report a Spring Fishfly sighting in Boston on a given day, based on 24 verified sightings from GBIF citizen-science data. It is the 429th most-seen of the 1200 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 Boston 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, Boston ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in Minneapolis [Saint Paul] (United States, under 5%) and Detroit (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 Boston (24 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.
