Efferia albibarbis
In 3 days ~10% in a week ~20%
Efferia albibarbis is a species of robber fly in the family Asilidae. It is a known predator of Cicindela hirticollis and Habroscelimorpha dorsalis dorsalis. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Merritt Island National Wildlife Refuge | 🇺🇸 United States | |
| 2 | Joshua Tree National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sacramento | 🇺🇸 United States | |
| 2 | New York City | 🇺🇸 United States | |
| 3 | Miami | 🇺🇸 United States | |
| 4 | Chicago | 🇺🇸 United States | |
| 5 | Los Angeles | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Sand Hammertail sighting in Chicago on a given day, based on 17 verified sightings from GBIF citizen-science data. It is the 538th most-seen of the 978 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Sand Hammertail in Chicago on a given day, so our monthly data shows no clear season.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Sand Hammertail sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 5 cities where we can rate Sand Hammertail sightings, Chicago ranks 4th at under 5%, level with the leaders once rounded. The best odds are in Sacramento (United States, under 5%), New York City (United States, under 5%) and Miami (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Sand Hammertail is recorded against all the insects logged in Chicago (17 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.
