Laphria franciscana
In 3 days ~10% in a week ~30%
Laphria franciscana is a species of robber flies in the family Asilidae. It is found in northeastern North America, including southern Ontario, Manitoba, Quebec, Nova Scotia and Maine, with its southernmost distribution being in Texas and Florida. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Yosemite National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Portland | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Western Black Laphria sighting in Yosemite National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 174th most-seen of the 227 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.
July
In that month about 10% of wildlife watchers report a Western Black Laphria in Yosemite National Park on a given day, against under 5% in August to June, the lowest months. That is one of Yosemite National Park's driest months, with about 25 mm of rain against 220 mm in January.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Western Black Laphria sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Only Yosemite National Park, in our data
Yosemite National Park is the only park on Wallace's Line with enough records to rate Western Black Laphria sightings: under 5% of wildlife watchers there report one on a given day.
Same order: Diptera
The closest relatives of the Western Black Laphria that you can see in Yosemite National Park (order Diptera, Flies) are Giant Western Crane Fly (about 10%) and White-Bowed Smoothwing (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Western Black Laphria is recorded against all the insects logged in Yosemite National Park (6 verified sightings from 2019 to 2026), 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.
