Laphria thoracica
In 3 days ~10% in a week ~30%
Laphria thoracica is a species of robber flies in the family Asilidae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States | |
| 2 | Great Smoky Mountains National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Boston | 🇺🇸 United States | |
| 2 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 3 | Montreal | 🇨🇦 Canada | |
| 4 | Toronto | 🇨🇦 Canada | |
| 5 | Detroit | 🇺🇸 United States | |
| 6 | Chicago | 🇺🇸 United States | |
| 7 | Baltimore | 🇺🇸 United States | |
| 8 | Washington | 🇺🇸 United States | |
| 9 | New York City | 🇺🇸 United States | |
| 10 | Philadelphia | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report an Eastern Yellow-Backed Laphria sighting in Great Smoky Mountains National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 513th most-seen of the 822 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 June
In those months about 10% of wildlife watchers report an Eastern Yellow-Backed Laphria in Great Smoky Mountains National Park on a given day, against under 5% in July to April, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Eastern Yellow-Backed Laphria sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 2
Of the 2 parks where we can rate Eastern Yellow-Backed Laphria sightings, Great Smoky Mountains National Park ranks 2nd at under 5%. The best odds are in Shenandoah National Park (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Eastern Yellow-Backed Laphria is recorded against all the insects logged in Great Smoky Mountains National Park (7 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.
