Xylocopa sonorina
In 3 days ~30% in a week ~50%
Xylocopa sonorina, the valley carpenter bee or Hawaiian carpenter bee, is a species of carpenter bee found from western Texas to northern California, and the eastern Pacific islands. Females are black while males are golden-brown with green eyes.
X. sonorina is one of three southwestern US species in the genus Xylocopa, which has 31 subgenera and 500 species worldwide. Frederick Smith, Assistant in the Zoological Department of the British Museum and member of the council of the Entomological Society of London, first described X. sonorina in 1874 from specimens collected in Hawaii. Until 1956, it was thought that X. sonorina came from the Sunda Islands, but in a paper published that year, M. A. Lieftinck showed that Smith's interpretation of the original specimen labels was in error: Smith had mistakenly read the label of X. sonorina as meaning the Sunda Islands instead of the Sandwich Islands.
In 1899, R. C. L. Perkins described the same species as Xylocopa aeneipennis, and in 1922, P. H. Timberlake claimed that the Hawaiian Xylocopa was the same as the mainland X. varipuncta, that had been named in 1879, and Roy Snelling predicted in 2003 that X. varipuncta would eventually... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Saguaro National Park | 🇺🇸 United States | |
| 2 | Channel Islands National Park | 🇺🇸 United States | |
| 3 | Joshua Tree National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sacramento | 🇺🇸 United States | |
| 2 | Mesa | 🇺🇸 United States | |
| 3 | Ciudad Juárez | 🇲🇽 México | |
| 4 | Los Angeles | 🇺🇸 United States | |
| 5 | Tijuana | 🇲🇽 México | |
| 6 | Phoenix | 🇺🇸 United States | |
| 7 | Las Vegas | 🇺🇸 United States | |
| 8 | San Francisco | 🇺🇸 United States | |
| 9 | San Diego | 🇺🇸 United States | |
| 10 | Mexico City | 🇲🇽 México |
With luck
About 10% of wildlife watchers report a Valley Carpenter Bee sighting in San Francisco on a given day, based on 719 verified sightings from GBIF citizen-science data. It is the 36th most-seen of the 737 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
April
In that month about 20% of wildlife watchers report a Valley Carpenter Bee in San Francisco on a given day, against under 5% in December to February, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Valley Carpenter 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.
8th of 12
Of the 12 cities where we can rate Valley Carpenter Bee sightings, San Francisco ranks 8th at about 10%. The best odds are in Sacramento (United States, about 40%), Mesa (United States, about 20%) and Ciudad Juárez (México, about 20%).
GBIF citizen-science records
It is estimated from how often the Valley Carpenter Bee is recorded against all the insects logged in San Francisco (719 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.
