Bibio albipennis
In 3 days ~10% in a week ~20%
Bibio albipennis is a species of March fly. It native to North America, where it is widespread. The larvae are detrivores. J. W. P. Jenks found them to be a seasonal food source for robins. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Salt Lake City | 🇺🇸 United States | |
| 2 | San Francisco | 🇺🇸 United States | |
| 3 | Los Angeles | 🇺🇸 United States | |
| 4 | Sacramento | 🇺🇸 United States | |
| 5 | Seattle | 🇺🇸 United States | |
| 6 | Toronto | 🇨🇦 Canada | |
| 7 | Denver | 🇺🇸 United States | |
| 8 | Vancouver | 🇨🇦 Canada | |
| 9 | Chicago | 🇺🇸 United States | |
| 10 | Montreal | 🇨🇦 Canada |
Rare
Under 5% of wildlife watchers report a White-Winged March Fly sighting in Denver on a given day, based on 6 verified sightings from GBIF citizen-science data. It is the 384th most-seen of the 461 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
In that month about 10% of wildlife watchers report a White-Winged March Fly in Denver on a given day, against under 5% in June to April, the lowest months. That is one of Denver's wettest months, with about 60 mm of rain against 15 mm in January.
Among the best
Of the 11 cities where we can rate White-Winged March Fly sightings, Denver ranks 7th at under 5%, level with the leaders once rounded. The best odds are in Salt Lake City (United States, under 5%), San Francisco (United States, under 5%) and Los Angeles (United States, under 5%).
Same order: Diptera
The closest relatives of the White-Winged March Fly that you can see in Denver (order Diptera, Flies) are Eurasian Drone Fly (about 10%), Margined Calligrapher (about 10%) and Large-Tailed Aphideater (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the White-Winged March Fly is recorded against all the insects logged in Denver (6 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.
