Sphex ichneumoneus
In 3 days ~20% in a week ~30%
Sphex ichneumoneus, known commonly as the great golden digger wasp or great golden sand digger is a wasp in the family Sphecidae. It is identified by the golden pubescence on its head and thorax, its reddish orange legs, and partly reddish orange body. This wasp is native to the Western Hemisphere, from Canada to South America, and provisions its young with various types of paralyzed Orthoptera.
Douglas Hofstadter cites the observation by Woodridge of S. ichneumoneus continually repeating behavior (checking a burrow before pulling in a cricket) as an example of genetic determinism, calling the behavior "sphexish". It is an example of a fixed action pattern, as described by H.J. Brockmann, where the sign stimulus is the sight of paralyzed prey in correct orientation (head facing burrow) and position (≤3 cm from entrance in alignment with the dug mound) and the behavioral sequence is to pull the prey into the burrow by its antennae, if present (otherwise the wasp will position the prey outside, go into the burrow alone, reemerge headfirst and reevaluate, although it may uncommonly attempt to pull the prey in by another part of its body). The burrow of the great golden sand digger consists of a descending shaft with individual brood chambers arranged at right angles to it. This arrangement makes it difficult to pull prey into a brood chamber without getting stuck and is one possible reason why the wasp always checks to ensure the path is clear before preferentially pulling its prey down by its antennae. In addition, female wasps commonly build their burrows nearby those of other females of their species and may even share a nest, but will fight with other wasps if they encounter them inside their burrow during prey retrieval. Thus, an unattended nest may pose a risk to a laden wasp if it has not been inspected first. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Grand Canyon National Park | 🇺🇸 United States | |
| 2 | Acadia National Park | 🇺🇸 United States | |
| 3 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 4 | Everglades National Park | 🇺🇸 United States | |
| 5 | Yosemite National Park | 🇺🇸 United States | |
| 6 | Shenandoah National Park | 🇺🇸 United States | |
| 7 | Olympic National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Seattle | 🇺🇸 United States | |
| 2 | Toronto | 🇨🇦 Canada | |
| 3 | Boston | 🇺🇸 United States | |
| 4 | Detroit | 🇺🇸 United States | |
| 5 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 6 | Chicago | 🇺🇸 United States | |
| 7 | Austin | 🇺🇸 United States | |
| 8 | Dallas | 🇺🇸 United States | |
| 9 | New York City | 🇺🇸 United States | |
| 10 | Los Angeles | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Great Golden Digger Wasp sighting in San Diego on a given day, based on 182 verified sightings from GBIF citizen-science data. It is the 69th most-seen of the 693 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 to August
In those months about 10% of wildlife watchers report a Great Golden Digger Wasp in San Diego on a given day, against under 5% in September to April, the lowest months. Those are among San Diego's driest months, with about 5 mm of rain a month against 55 mm in February.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Great Golden Digger Wasp sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
12th of 21
Of the 21 cities where we can rate Great Golden Digger Wasp sightings, San Diego ranks 12th at about 10%. The best odds are in Seattle (United States, about 20%), Toronto (Canada, about 10%) and Boston (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Great Golden Digger Wasp is recorded against all the insects logged in San Diego (182 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.
