Criorhina nigripes
In 3 days ~10% in a week ~20%
Criorhina nigripes is a species of hoverfly in the family Syrphidae. Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Williston's Bumble Fly sighting in Seattle on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 380th most-seen of the 428 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Williston's Bumble Fly in Seattle on a given day, so our monthly data shows no clear season.
Among the best
Of the 2 cities where we can rate Williston's Bumble Fly sightings, Seattle ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Portland (United States, under 5%).
Same family: Syrphidae
The closest relatives of the Williston's Bumble Fly that you can see in Seattle (family Syrphidae, Hover Flies) are Yellow-Haired Sun Fly (about 10%), Eurasian Drone Fly (about 10%) and Narcissus Bulb Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Williston's Bumble Fly is recorded against all the insects logged in Seattle (5 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.
