Coenosia tigrina
In 3 days ~10% in a week ~30%
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 Portland on a given day, based on 24 verified sightings from GBIF citizen-science data. It is the 204th most-seen of the 507 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.
May and October
In those months about 10% of wildlife watchers report a Common Tiger Fly in Portland on a given day, against under 5% in June–September and November–April, the lowest months.
Among the best
Of the 12 cities where we can rate Common Tiger Fly sightings, Portland ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Liverpool (United Kingdom, under 5%).
Same order: Diptera
The closest relatives of the Common Tiger Fly that you can see in Portland (order Diptera, Flies) are Yellow-Haired Sun Fly (about 10%), Black Soldier 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 Portland (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.
