Sphaerophoria sulphuripes
In 3 days ~20% in a week ~30%
Sphaerophoria sulphuripes, the forked globetail, is a species of syrphid flies in the family Syrphidae native to Western North America. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sacramento | 🇺🇸 United States | |
| 2 | Portland | 🇺🇸 United States | |
| 3 | Seattle | 🇺🇸 United States | |
| 4 | San Francisco | 🇺🇸 United States | |
| 5 | Vancouver | 🇨🇦 Canada | |
| 6 | Los Angeles | 🇺🇸 United States | |
| 7 | San Diego | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Forked Globetail sighting in San Francisco on a given day, based on 289 verified sightings from GBIF citizen-science data. It is the 77th most-seen of the 737 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
April to August
In those months about 10% of wildlife watchers report a Forked Globetail in San Francisco on a given day, against under 5% in September to March, the lowest months. Those are among San Francisco's driest months, with about 10 mm of rain a month against 110 mm in December.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Forked Globetail sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 7 cities where we can rate Forked Globetail sightings, San Francisco ranks 4th at about 10%, level with the leaders once rounded. The best odds are in Sacramento (United States, about 10%), Portland (United States, about 10%) and Seattle (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Forked Globetail is recorded against all the insects logged in San Francisco (289 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.
