Xylocopa tabaniformis
In 3 days ~10% in a week ~30%
Xylocopa tabaniformis, the horsefly-like carpenter bee or mountain carpenter bee is a species of carpenter bee in the family Apidae. It is found in Central America, North America, and South America. It is 12–18 millimetres (15⁄32–23⁄32 in) long and black. Males have yellow hair on the thorax.
Xylocopa tabaniformis tabaniformis Smith, 1854 Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Reserva de la Biosfera Mariposa Monarca | 🇲🇽 Mexico | |
| 2 | Zion National Park | 🇺🇸 United States | |
| 3 | Sequoia and Kings Canyon National Parks | 🇺🇸 United States | |
| 4 | Cumbres de Monterrey National Park | 🇲🇽 Mexico | |
| 5 | Yosemite National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Sacramento | 🇺🇸 United States | |
| 2 | Salt Lake City | 🇺🇸 United States | |
| 3 | Mexico City | 🇲🇽 México | |
| 4 | Toluca | 🇲🇽 México | |
| 5 | Austin | 🇺🇸 United States | |
| 6 | San Antonio | 🇺🇸 United States | |
| 7 | Houston | 🇺🇸 United States | |
| 8 | San Francisco | 🇺🇸 United States | |
| 9 | San Luis Potosí | 🇲🇽 México | |
| 10 | Dallas | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Horse-Fly Carpenter Bee sighting in Yosemite National Park on a given day, based on 7 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 159th most-seen of the 227 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, June–July and October
In those months about 10% of wildlife watchers report a Horse-Fly Carpenter Bee in Yosemite National Park on a given day, against under 5% in May, August–September and November–March, the lowest months. Those are among Yosemite National Park's driest months, with about 45 mm of rain a month against 220 mm in January.
Between 5 and 8 pm
Across all the parks we cover, that three-hour window holds the most Horse-Fly Carpenter Bee sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
5th of 5
Of the 5 parks where we can rate Horse-Fly Carpenter Bee sightings, Yosemite National Park ranks 5th at under 5%. The best odds are in Reserva de la Biosfera Mariposa Monarca (Mexico, about 20%), Zion National Park (United States, about 10%) and Sequoia and Kings Canyon National Parks (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Horse-Fly Carpenter Bee is recorded against all the insects logged in Yosemite National Park (7 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.
