Laphria thoracica
In 3 days ~20% in a week ~40%
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 |
With luck
About 10% of wildlife watchers report an Eastern Yellow-Backed Laphria sighting in Boston on a given day, based on 82 verified sightings from GBIF citizen-science data. It is the 184th most-seen of the 1200 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
June
In that month about 20% of wildlife watchers report an Eastern Yellow-Backed Laphria in Boston 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.
Yes
Of the 10 cities where we can rate Eastern Yellow-Backed Laphria sightings, Boston has the highest daily chance: about 10%. Next come Minneapolis [Saint Paul] (United States, about 10%) and Montreal (Canada, 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 Boston (82 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.
