Coreus marginatus
In 3 days ~10% in a week ~30%
Coreus marginatus is a herbivorous species of true bug in the family Coreidae. It is commonly known as the dock bug as it feeds on the leaves and seeds of docks and sorrels. It is a medium-sized speckled brown insect, between 13 and 15 mm long as an adult, with a broad abdomen. It occurs throughout Europe, Asia and northern Africa. It is often found in dense vegetation, such as hedgerows and wasteland.
This species was among the first Hemiptera formally described in the scientific literature by the Swedish biologist Carl Linnaeus in 1758, under the name Cimex marginatus. It was transferred to the genus Coreus by the Danish zoologist Johan Fabricius in 1794. It has numerous synonyms and was historically placed in the genus Syromastus.
The specific epithet marginatus refers to the prominent margins of the abdomen. The head, pronotum and abdomen of an adult dock bug are speckled reddish brown. The antennae are composed of four segments, red-orange in colour except for the final fourth segment which is black. Between the antennae are two small projections, known as antenniferous tubercles, which can be used to distinguish this species from other superficially... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cévennes National Park | 🇫🇷 France | |
| 2 | Biebrza National Park | 🇵🇱 Poland | |
| 3 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 4 | Picos de Europa National Park | 🇪🇸 Spain | |
| 5 | Ecrins National Park | 🇫🇷 France | |
| 6 | Aigüestortes National Park | 🇪🇸 Spain | |
| 7 | Białowieża National Park | 🇵🇱 Poland | |
| 8 | Pyrénées National Park | 🇫🇷 France | |
| 9 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 10 | Tatra National Park | 🇸🇰 Slovakia | |
| 11 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 12 | Triglav National Park | 🇸🇮 Slovenia | |
| 13 | Vanoise National Park | 🇫🇷 France | |
| 14 | Fertő-Hanság National Park | 🇭🇺 Hungary | |
| 15 | Mercantour National Park | 🇫🇷 France | |
| 16 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 17 | Wadden Sea National Park | 🇩🇪 Germany |
Rare
Under 5% of wildlife watchers report a Dock Bug sighting in Copenhagen on a given day, based on 12 verified sightings from GBIF citizen-science data. It is the 234th most-seen of the 476 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.
May
In that month about 10% of wildlife watchers report a Dock Bug in Copenhagen on a given day, against under 5% in June to April, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Dock Bug sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
39th of 40
Of the 40 cities where we can rate Dock Bug sightings, Copenhagen ranks 39th at under 5%. The best odds are in Kharkiv (Ukraine, about 30%), Liverpool (United Kingdom, about 30%) and Birmingham (United Kingdom, about 30%).
Same family: Coreidae
The closest relatives of the Dock Bug that you can see in Copenhagen (family Coreidae, Leaf-footed Bugs) are Western Conifer Seed Bug (about 20%) and Box Bug (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Dock Bug is recorded against all the insects logged in Copenhagen (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.
