Dyroderes umbraculatus
In 3 days ~10% in a week ~20%
Dyroderes umbraculatus is a shield bug belonging to the family Pentatomidae, subfamily Pentatominae. The species was first described by Johan Christian Fabricius in 1775. The genus Dyroderes has one living representative, but BioLib also records one fossil species: †Dyroderes laticollis Piton, 1940.
D. umbraculatus mainly lives on Galium species and is found in Austria, the British Isles, Bulgaria, France, Greece, Hungary, Italy, Portugal, Spain and Switzerland. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cévennes National Park | 🇫🇷 France | |
| 2 | Pyrénées National Park | 🇫🇷 France |
Rare
Under 5% of wildlife watchers report a White-Shouldered Shieldbug sighting in Porto on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 357th most-seen of the 498 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
April and June–July
In those months about 10% of wildlife watchers report a White-Shouldered Shieldbug in Porto on a given day, against under 5% in May and August–March, the lowest months. Those are among Porto's driest months, with about 45 mm of rain a month against 140 mm in January.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most White-Shouldered Shieldbug sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
9th of 12
Of the 12 cities where we can rate White-Shouldered Shieldbug sightings, Porto ranks 9th at under 5%. The best odds are in Bucharest (Romania, about 10%), Valencia (Spain, about 10%) and Rome (Italy, about 10%).
Same family: Pentatomidae
The closest relatives of the White-Shouldered Shieldbug that you can see in Porto (family Pentatomidae, Stink Bugs) are European Striped Shield Bug (about 10%), Southern Green Stink Bug (about 10%) and Mottled Stink Bug (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the White-Shouldered Shieldbug is recorded against all the insects logged in Porto (9 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.
