Leptura quadrifasciata
In 3 days ~20% in a week ~50%
Leptura quadrifasciata, the four-banded longhorn beetle, is a species of beetle in the family Cerambycidae. It was described by Carl Linnaeus in his landmark 1758 10th edition of Systema Naturae. Adult beetles are 11–20 mm long, black with four more or less continuous transverse yellow bands. In extreme cases the elytra may be almost entirely black. It is found throughout the northern and central Palearctic realm. The species is distributed in northern and central regions of Europe and Asia. It is particularly common in Scandinavia, Finland and Great Britain and is typically seen during the summer months. Larvae make meandering galleries in various trees, including oak, beech, birch, willow, alder, elder and spruce; typically in dead and decaying trees, with a preference for damp areas. The life cycle lasts two to three years. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Białowieża National Park | 🇵🇱 Poland | |
| 2 | Biebrza National Park | 🇵🇱 Poland | |
| 3 | Cairngorms National Park | 🇬🇧 United Kingdom | |
| 4 | Tatra National Park | 🇸🇰 Slovakia | |
| 5 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 6 | Ecrins National Park | 🇫🇷 France | |
| 7 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 8 | Pyrénées National Park | 🇫🇷 France | |
| 9 | Wadden Sea National Park | 🇩🇪 Germany |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Helsinki | 🇫🇮 Finland | |
| 2 | Warsaw | 🇵🇱 Poland | |
| 3 | Amsterdam | 🇳🇱 Netherlands | |
| 4 | Hamburg | 🇩🇪 Germany | |
| 5 | Novosibirsk | 🇷🇺 Russia | |
| 6 | Rotterdam [The Hague] | 🇳🇱 Netherlands | |
| 7 | Essen | 🇩🇪 Germany | |
| 8 | Berlin | 🇩🇪 Germany | |
| 9 | Copenhagen | 🇩🇰 Denmark | |
| 10 | Minsk | 🇧🇾 Belarus |
With luck
About 10% of wildlife watchers report a Four-Banded Longhorn Beetle sighting in Helsinki on a given day, based on 49 verified sightings from GBIF citizen-science data. It is the 96th most-seen of the 838 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
July
In that month about 20% of wildlife watchers report a Four-Banded Longhorn Beetle in Helsinki on a given day, against under 5% in September to May, the lowest months.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Four-Banded Longhorn Beetle sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 19 cities where we can rate Four-Banded Longhorn Beetle sightings, Helsinki has the highest daily chance: about 10%. Next come Warsaw (Poland, about 10%) and Amsterdam (Netherlands, about 10%).
Same family: Cerambycidae
The closest relatives of the Four-Banded Longhorn Beetle that you can see in Helsinki (family Cerambycidae, Longhorn Beetles) are Musk Beetle (about 10%), Red Pine Longhorn Beetle (about 10%) and Poplar Borer (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Four-Banded Longhorn Beetle is recorded against all the insects logged in Helsinki (49 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.
