Efferia albibarbis
In 3 days ~10% in a week ~30%
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 Sacramento on a given day, based on 14 verified sightings from GBIF citizen-science data. It is the 192nd most-seen of the 386 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.
June to August
In those months about 10% of wildlife watchers report a Sand Hammertail in Sacramento on a given day, against under 5% in September to May, the lowest months. Those are among Sacramento's driest months, with almost no rain against 120 mm in December.
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.
Yes
Of the 5 cities where we can rate Sand Hammertail sightings, Sacramento has the highest daily chance: under 5%. Next come 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 Sacramento (14 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.
