Nigronia fasciata
In 3 days ~20% in a week ~40%
Nigronia fasciata is a species of megalopterous dark fishfly in the Corydalidae family. The typical size of N. fasciata is 22 to 28 millimeters, or 2.2 to 2.8 centimeters. Range: Eastern United States. Note: not present in Canada. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Banded Dark Fishfly sighting in Great Smoky Mountains National Park on a given day, based on 19 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 276th most-seen of the 822 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
March, May–June and November
In those months about 10% of wildlife watchers report a Banded Dark Fishfly in Great Smoky Mountains National Park on a given day, against under 5% in April, July–October and December–February, the lowest months.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Banded Dark Fishfly sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is seen both by day and at night.
Only Great Smoky Mountains National Park, in our data
Great Smoky Mountains National Park is the only park on Wallace's Line with enough records to rate Banded Dark Fishfly sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Banded Dark Fishfly is recorded against all the insects logged in Great Smoky Mountains National Park (19 verified sightings from 2019 to 2026), 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.
