Halictus tripartitus
In 3 days ~30% in a week ~60%
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 Channel Islands National Park on a given day, based on 28 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 31st most-seen of the 131 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
March and May–August
In those months about 20% of wildlife watchers report a Tripartite Sweat Bee in Channel Islands National Park on a given day, against under 5% in October to February, the lowest months. Those are among Channel Islands National Park's driest months, with about 15 mm of rain a month against 60 mm in January.
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.
Only Channel Islands National Park, in our data
Channel Islands National Park is the only park on Wallace's Line with enough records to rate Tripartite Sweat Bee sightings: about 10% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Tripartite Sweat Bee is recorded against all the insects logged in Channel Islands National Park (28 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.
