Leptoglossus occidentalis
In 3 days ~30% in a week ~60%
The western conifer seed bug (Leptoglossus occidentalis), sometimes called the pine-beetle, or abbreviated as WCSB, is a species of true bug (Hemiptera) in the family Coreidae. It is native to North America west of the Rocky Mountains (California to British Columbia, east to Idaho, Minnesota, and Nevada) but has in recent times expanded its range to eastern North America, to include Ontario, Québec, New Brunswick, Nova Scotia, Prince Edward Island, Michigan, Maine, Pennsylvania, New York, New Jersey, Connecticut, Massachusetts, Rhode Island, New Hampshire, Vermont, Ohio, Indiana, Kentucky, and Wisconsin, and has become an accidental introduced species in parts of Europe and Argentina.
This species is a member of the insect family Coreidae, or leaf-footed bugs, which also includes the similar Leptoglossus phyllopus and Acanthocephala femorata, both known as the "Florida leaf-footed bug". Western conifer seed bugs are sometimes colloquially called stink bugs. While they do use a foul-smelling spray as a defense, they are not classified in the stink bug family Pentatomidae. In Chile, it has been confused with kissing bugs (Triatominae), causing unjustified alarm.
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| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cape Breton Highlands National Park | 🇨🇦 Canada | |
| 2 | Acadia National Park | 🇺🇸 United States | |
| 3 | Cévennes National Park | 🇫🇷 France | |
| 4 | Wadden Sea National Park | 🇩🇪 Germany | |
| 5 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 6 | Picos de Europa National Park | 🇪🇸 Spain | |
| 7 | Nahuel Huapi National Park | 🇦🇷 Argentina | |
| 8 | Tatra National Park | 🇸🇰 Slovakia | |
| 9 | Sierra de Guadarrama National Park | 🇪🇸 Spain | |
| 10 | Sierra Nevada National Park | 🇪🇸 Spain | |
| 11 | Triglav National Park | 🇸🇮 Slovenia | |
| 12 | Pyrénées National Park | 🇫🇷 France | |
| 13 | Fertő-Hanság National Park | 🇭🇺 Hungary | |
| 14 | Glacier National Park | 🇺🇸 United States | |
| 15 | Great Bear Rainforest | 🇨🇦 Canada | |
| 16 | Zion National Park | 🇺🇸 United States | |
| 17 | Rocky Mountain National Park | 🇺🇸 United States | |
| 18 | Yosemite National Park | 🇺🇸 United States | |
| 19 | Olympic National Park | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Western Conifer Seed Bug sighting in Picos de Europa National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 85th most-seen of the 118 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
September
In that month about 30% of wildlife watchers report a Western Conifer Seed Bug in Picos de Europa National Park on a given day, against under 5% in May, July and November–March, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Western Conifer Seed Bug sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
6th of 19
Of the 19 parks where we can rate Western Conifer Seed Bug sightings, Picos de Europa National Park ranks 6th at about 10%. The best odds are in Cape Breton Highlands National Park (Canada, about 20%), Acadia National Park (United States, about 20%) and Cévennes National Park (France, about 20%).
GBIF citizen-science records
It is estimated from how often the Western Conifer Seed Bug is recorded against all the insects logged in Picos de Europa National Park (6 verified sightings from 2019 to 2026), 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.
