Alydus calcaratus
In 3 days ~10% in a week ~20%
Alydus calcaratus is a bug species with a Holarctic distribution ranging from the British Isles almost all over Europe to eastern Siberia and China. Moreover, the species also in northern North America from Alaska and Québec across the United States to Wyoming. It is the only species in the family in northern Central Europe outside of the Alps.
Alydus calcaratus is a large (10.0 to 12.0 mm), oblong and mainly blackish-coloured bug. The head is as wide as the pronotum, the rear corners of the pronotum are rounded. The hind leg (femora) of the males are thickened and have several strong spines on the underside. As with all the other species of the family (Alydidae), the antennae have four segments, of which the fourth is curved. The body is blackish, the dorsum of the abdomen has a bright orange patch, which is visible only in flight. They resemble spider-hunting wasps such as Arachnospila.
Alydus calcaratus is phytophagous, the imagines and the nymphs feeding mostly on fallen seeds of various legumes (Fabaceae) especially species of the genera Sarothamnus, Cytisus, Genista and Ulex. Feeding on vertebrate carrion and faeces has also been observed. In Germany, imagines can be observed from the middle or end of June at the earliest, most occur in early August to mid-September, and the last observations are in October. The animals mate from July to September, nymphs were found from May to August. Information on the way of life of the nymphs is contradictory. The nymphs are said to live in ant nests but the nature of the relationship of the nymphs to ants is still unclear.
The habitat is heaths, dry grassland, dry places with light soils and sand dunes. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Vanoise National Park | 🇫🇷 France | |
| 2 | Mercantour National Park | 🇫🇷 France | |
| 3 | Ecrins National Park | 🇫🇷 France | |
| 4 | Pyrénées National Park | 🇫🇷 France | |
| 5 | Cévennes National Park | 🇫🇷 France |
Rare
Under 5% of wildlife watchers report an Ant Bug sighting in Munich on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 295th most-seen of the 521 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.
September
In that month about 10% of wildlife watchers report an Ant Bug in Munich on a given day, against under 5% in October to August, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Ant Bug sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
4th of 7
Of the 7 cities where we can rate Ant Bug sightings, Munich ranks 4th at under 5%. The best odds are in Helsinki (Finland, about 10%), Warsaw (Poland, about 10%) and Berlin (Germany, under 5%).
Same order: Hemiptera
The closest relatives of the Ant Bug that you can see in Munich (order Hemiptera, True Bugs, Hoppers, Aphids, and allies) are Brown Marmorated Stink Bug (about 20%), Forest Bug (about 20%) and European Firebug (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Ant Bug is recorded against all the insects logged in Munich (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.
