Pepsis thisbe
In 3 days ~20% in a week ~30%
Pepsis thisbe, also known as Thisbe's tarantula-hawk wasp, is a species of spider wasp in the family Pompilidae. Females are 32-44 mm long with a dark blue body and orange wings. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Grand Canyon National Park | 🇺🇸 United States | |
| 2 | Zion National Park | 🇺🇸 United States | |
| 3 | Joshua Tree National Park | 🇺🇸 United States | |
| 4 | Saguaro National Park | 🇺🇸 United States | |
| 5 | Big Bend National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Phoenix | 🇺🇸 United States | |
| 2 | Mesa | 🇺🇸 United States | |
| 3 | Los Angeles | 🇺🇸 United States | |
| 4 | Mexico City | 🇲🇽 México | |
| 5 | San Antonio | 🇺🇸 United States | |
| 6 | San Diego | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Thisbe's Tarantula-Hawk Wasp sighting in Big Bend National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 255th most-seen of the 329 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
May
In that month about 20% of wildlife watchers report a Thisbe's Tarantula-Hawk Wasp in Big Bend National Park on a given day, against under 5% in June–September and November–April, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Thisbe's Tarantula-Hawk Wasp sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 5 parks where we can rate Thisbe's Tarantula-Hawk Wasp sightings, Big Bend National Park ranks 5th at about 10%, level with the leaders once rounded. The best odds are in Grand Canyon National Park (United States, about 10%), Zion National Park (United States, about 10%) and Joshua Tree National Park (United States, about 10%).
Same order: Hymenoptera
The closest relatives of the Thisbe's Tarantula-Hawk Wasp that you can see in Big Bend National Park (order Hymenoptera, Ants, Bees, Wasps, and Sawflies) are Comanche Paper Wasp (about 30%), Rough Harvester Ant (about 20%) and Western Carpenter Bee (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Thisbe's Tarantula-Hawk Wasp is recorded against all the insects logged in Big Bend National Park (6 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.
