Odontoloxozus longicornis
In 3 days ~10% in a week ~30%
Odontoloxozus longicornis, the longhorn cactus fly, is a species of cactus flies (insects in the family Neriidae). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Saguaro National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Mesa | 🇺🇸 United States | |
| 2 | Phoenix | 🇺🇸 United States | |
| 3 | Austin | 🇺🇸 United States | |
| 4 | San Diego | 🇺🇸 United States | |
| 5 | Los Angeles | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Longhorn Cactus Fly sighting in Saguaro National Park on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 176th most-seen of the 354 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.
February and October–December
In those months about 10% of wildlife watchers report a Longhorn Cactus Fly in Saguaro National Park on a given day, against under 5% in January and March–September, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Longhorn Cactus Fly sightings with a recorded time, and about 8 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 Longhorn Cactus Fly sightings: under 5% of wildlife watchers there report one on a given day.
Same order: Diptera
The closest relatives of the Longhorn Cactus Fly that you can see in Saguaro National Park (order Diptera, Flies) are Large Creosote Gall Midge (about 20%), Copestylum marginatum (about 10%) and Isabelle's Bromeliad Fly (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Longhorn Cactus Fly is recorded against all the insects logged in Saguaro National Park (11 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.
