Coenosia tigrina
In 3 days ~10% in a week ~20%
Coenosia tigrina, the hunter fly, killer fly, or common tiger fly, is a species of fly in the family Muscidae. Like other members of the genus, adults are predators that hunt flying insects, while larvae feed on earthworms. It is found in the Palearctic. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Liverpool | 🇬🇧 United Kingdom | |
| 2 | Portland | 🇺🇸 United States | |
| 3 | Salt Lake City | 🇺🇸 United States | |
| 4 | Seattle | 🇺🇸 United States | |
| 5 | Boston | 🇺🇸 United States | |
| 6 | Montreal | 🇨🇦 Canada | |
| 7 | London | 🇬🇧 United Kingdom | |
| 8 | New York City | 🇺🇸 United States | |
| 9 | Vancouver | 🇨🇦 Canada | |
| 10 | San Francisco | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Common Tiger Fly sighting in Seattle on a given day, based on 25 verified sightings from GBIF citizen-science data. It is the 173rd 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.
July to September
In those months about 10% of wildlife watchers report a Common Tiger Fly in Seattle on a given day, against under 5% in October to June, the lowest months. Those are among Seattle's driest months, with about 35 mm of rain a month against 190 mm in November.
Among the best
Of the 12 cities where we can rate Common Tiger Fly sightings, Seattle ranks 4th at under 5%, level with the leaders once rounded. The best odds are in Liverpool (United Kingdom, under 5%), Portland (United States, under 5%) and Salt Lake City (United States, under 5%).
Same order: Diptera
The closest relatives of the Common Tiger Fly that you can see in Seattle (order Diptera, 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 Common Tiger Fly is recorded against all the insects logged in Seattle (25 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.
