Zethus slossonae
In 3 days ~40% in a week ~60%
Zethus slossonae, known as slosson's mason wasp, is a species of stinging wasp in the family Vespidae. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Big Cypress National Preserve | 🇺🇸 United States | |
| 2 | Everglades National Park | 🇺🇸 United States | |
| 3 | Merritt Island National Wildlife Refuge | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Slosson's Mason Wasp sighting in Everglades National Park on a given day, based on 72 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 58th most-seen of the 496 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 60%, if each day is a fresh chance.
July and August
In those months about 30% of wildlife watchers report a Slosson's Mason Wasp in Everglades National Park on a given day, against under 5% in April, the lowest month. Those are among Everglades National Park's wettest months, with about 160 mm of rain a month against 40 mm in March.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Slosson's Mason Wasp sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
2nd of 3
Of the 3 parks where we can rate Slosson's Mason Wasp sightings, Everglades National Park ranks 2nd at about 10%. The best odds are in Big Cypress National Preserve (United States, about 20%).
Same family: Eumenidae
The closest relatives of the Slosson's Mason Wasp that you can see in Everglades National Park (family Eumenidae) are Horse Paper Wasp (about 20%), Metric Paper Wasp (about 10%) and Red-Marked Pachodynerus Wasp (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Slosson's Mason Wasp is recorded against all the insects logged in Everglades National Park (72 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.
