Cyphostethus tristriatus
In 3 days ~10% in a week ~30%
The juniper shield bug (Cyphostethus tristriatus), (family: Acanthosomatidae), is a large (9–10.5 mm) green shield bug with distinctive pinkish-red markings on the corium. The bug's traditional foodplant is juniper, with the larvae feeding on juniper berries. It has also adapted to use Lawson cypress(Chamaecyparis spp.) as a host. In the United Kingdom it was formerly scarce and restricted largely to southern juniper woodlands but in recent years it has become common across southern and central England as a result of the widespread garden planting of juniper and cypress. Recent discoveries on stands of juniper in northern England and Scotland suggest that the range of the species may be extending.
The juniper shield bug is active for most of the year apart from the coldest months. It overwinters as an adult, emerging to mate in the early spring. New adults may be found from late August onwards. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cévennes National Park | 🇫🇷 France | |
| 2 | Pyrénées National Park | 🇫🇷 France |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Birmingham | 🇬🇧 United Kingdom | |
| 2 | London | 🇬🇧 United Kingdom | |
| 3 | Brussels | 🇧🇪 Belgium | |
| 4 | Copenhagen | 🇩🇰 Denmark | |
| 5 | Vancouver | 🇨🇦 Canada | |
| 6 | Warsaw | 🇵🇱 Poland | |
| 7 | Essen | 🇩🇪 Germany | |
| 8 | Paris | 🇫🇷 France | |
| 9 | Manchester | 🇬🇧 United Kingdom | |
| 10 | Hamburg | 🇩🇪 Germany |
Rare
Under 5% of wildlife watchers report a Juniper Shield Bug sighting in Vancouver on a given day, based on 51 verified sightings from GBIF citizen-science data. It is the 114th most-seen of the 482 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.
February–April, August and November–December
In those months about 10% of wildlife watchers report a Juniper Shield Bug in Vancouver on a given day, against under 5% in January, May–July and September–October, the lowest months.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Juniper Shield Bug sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
5th of 14
Of the 14 cities where we can rate Juniper Shield Bug sightings, Vancouver ranks 5th at under 5%. The best odds are in Birmingham (United Kingdom, about 10%), London (United Kingdom, about 10%) and Brussels (Belgium, about 10%).
GBIF citizen-science records
It is estimated from how often the Juniper Shield Bug is recorded against all the insects logged in Vancouver (51 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.
