Halictus tripartitus
In 3 days ~10% in a week ~30%
Halictus tripartitus is a species of sweat bee in the family Halictidae. It is partially eusocial, with nests connected underground and some workers capable of reproducing. The species is a pollinator of Silene spaldingii. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Channel Islands National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sacramento | 🇺🇸 United States | |
| 2 | San Diego | 🇺🇸 United States | |
| 3 | Los Angeles | 🇺🇸 United States | |
| 4 | San Francisco | 🇺🇸 United States | |
| 5 | Salt Lake City | 🇺🇸 United States | |
| 6 | Mesa | 🇺🇸 United States | |
| 7 | Phoenix | 🇺🇸 United States | |
| 8 | Denver | 🇺🇸 United States | |
| 9 | Seattle | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Tripartite Sweat Bee sighting in San Francisco on a given day, based on 310 verified sightings from GBIF citizen-science data. It is the 85th most-seen of the 737 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.
April to August
In those months about 10% of wildlife watchers report a Tripartite Sweat Bee in San Francisco on a given day, against under 5% in September to March, the lowest months. Those are among San Francisco's driest months, with about 10 mm of rain a month against 110 mm in December.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Tripartite Sweat Bee 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 9 cities where we can rate Tripartite Sweat Bee sightings, San Francisco ranks 4th at about 10%, level with the leaders once rounded. The best odds are in Sacramento (United States, about 10%), San Diego (United States, about 10%) and Los Angeles (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Tripartite Sweat Bee is recorded against all the insects logged in San Francisco (310 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.
