Ocyptamus fuscipennis
In 3 days ~10% in a week ~30%
Ocyptamus fuscipennis is a species of syrphid fly in the family Syrphidae. This fly can be found throughout North America, as well as in Cuba. In Puerto Rico, this species in its larval stage is an predator of autumn cohorts of Toxoptera citricida. Adult flies are known to visit Xyris tennesseensis flowers. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States | |
| 2 | Great Smoky Mountains National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Houston | 🇺🇸 United States | |
| 2 | Washington | 🇺🇸 United States | |
| 3 | Baltimore | 🇺🇸 United States | |
| 4 | Philadelphia | 🇺🇸 United States | |
| 5 | Miami | 🇺🇸 United States | |
| 6 | New York City | 🇺🇸 United States | |
| 7 | Orlando | 🇺🇸 United States | |
| 8 | Dallas | 🇺🇸 United States | |
| 9 | Austin | 🇺🇸 United States | |
| 10 | Chicago | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Dusky-Winged Hover Fly sighting in Philadelphia on a given day, based on 24 verified sightings from GBIF citizen-science data. It is the 218th most-seen of the 632 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.
June and August–September
In those months about 10% of wildlife watchers report a Dusky-Winged Hover Fly in Philadelphia on a given day, against under 5% in July and October–May, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Dusky-Winged Hover Fly sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
4th of 12
Of the 12 cities where we can rate Dusky-Winged Hover Fly sightings, Philadelphia ranks 4th at under 5%. The best odds are in Houston (United States, about 10%), Washington (United States, under 5%) and Baltimore (United States, under 5%).
Same family: Syrphidae
The closest relatives of the Dusky-Winged Hover Fly that you can see in Philadelphia (family Syrphidae, Hover Flies) are Margined Calligrapher (about 10%), Eastern Calligrapher (about 10%) and Eurasian Drone Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Dusky-Winged Hover Fly is recorded against all the insects logged in Philadelphia (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.
