Trypoxylon politum
In 3 days ~10% in a week ~30%
The organ pipe mud dauber (Trypoxylon politum) is a predatory wasp in the family Crabronidae. It is fairly large, ranging from 3.9 to 5.1 cm, and has been recorded to fly from May to September. Females and males are similar in colour, a shiny black, with the end part of the back leg being pale yellow to white.
The organ pipe mud dauber gets its name from the distinctive shape and composition of its nests. It is native to eastern North America. Organ pipe mud daubers are also an exceedingly docile species of wasp, and generally beneficial to have around, as they serve to keep spider populations down; larvae feed on living paralyzed spiders.
The organ pipe mud dauber ranges from Southeastern Canada to the Eastern United States They use tree holes or the underside of bridges to construct their nests out of mud. Nest site choice usually depends on three specifications - a smooth, vertical surface with ample shade and rainfall protection, a source of mud nearby, and an adjacent forest. The females form long mud tubes consisting of multiple cells, which they fortify with paralyzed spiders. The female then lays an egg in each cell and leaves the nest; once the... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 2 | Shenandoah National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | New York City | 🇺🇸 United States | |
| 2 | Washington | 🇺🇸 United States | |
| 3 | Baltimore | 🇺🇸 United States | |
| 4 | Austin | 🇺🇸 United States | |
| 5 | Philadelphia | 🇺🇸 United States | |
| 6 | Toronto | 🇨🇦 Canada | |
| 7 | Houston | 🇺🇸 United States | |
| 8 | Dallas | 🇺🇸 United States | |
| 9 | San Antonio | 🇺🇸 United States | |
| 10 | Chicago | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report an Organ-Pipe Mud-Dauber Wasp sighting in Baltimore on a given day, based on 12 verified sightings from GBIF citizen-science data. It is the 349th most-seen of the 705 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.
June, August and December–January
In those months about 10% of wildlife watchers report an Organ-Pipe Mud-Dauber Wasp in Baltimore on a given day, against under 5% in February–May, July and September–November, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Organ-Pipe Mud-Dauber Wasp sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 10 cities where we can rate Organ-Pipe Mud-Dauber Wasp sightings, Baltimore ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in New York City (United States, under 5%) and Washington (United States, under 5%).
Same family: Crabronidae
The closest relatives of the Organ-Pipe Mud-Dauber Wasp that you can see in Baltimore (family Crabronidae, Square-headed Wasps, Sand Wasps, and Allies) are Eastern Cicada-Killer Wasp (about 20%) and Cerceris insolita (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Organ-Pipe Mud-Dauber Wasp is recorded against all the insects logged in Baltimore (12 verified sightings), 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.
