Apiomerus flaviventris
In 3 days ~20% in a week ~40%
Apiomerus flaviventris, a bee assassin bug (often called the yellow-bellied bee assassin), is an insect that feeds on bees. It is found in arid and semiarid southwestern North America. This bee assassin is known to extract plant resins and apply them as defensive chemicals to its eggs, protecting the eggs from predation, especially by ants, but possibly also other species. Females of A. flaviventris collect resin from brittlebush, Encelia farinosa Gray ex Torr. (Asteraceae). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Saguaro National Park | 🇺🇸 United States |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Yellow-Bellied Bee Assassin sighting in Saguaro National Park on a given day, based on 30 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 82nd most-seen of the 354 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
May
In that month about 20% of wildlife watchers report a Yellow-Bellied Bee Assassin in Saguaro National Park on a given day, against under 5% in October to April, the lowest months. That is one of Saguaro National Park's driest months, with almost no rain against 55 mm in July.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Yellow-Bellied Bee Assassin sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Saguaro National Park, in our data
Saguaro National Park is the only park on Wallace's Line with enough records to rate Yellow-Bellied Bee Assassin sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Reduviidae
The closest relatives of the Yellow-Bellied Bee Assassin that you can see in Saguaro National Park (family Reduviidae, Assassin Bugs) are Leafhopper Assassin Bug (about 10%), Triatoma rubida (about 10%) and Four-Spurred Assassin Bug (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Yellow-Bellied Bee Assassin is recorded against all the insects logged in Saguaro National Park (30 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.
