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#3949 · 🦗 bugs, crickets & other insects

Western Conifer Seed Bug

🇳🇱 Bladpootrandwants ·Leptoglossus occidentalis

🦗 Bugs, crickets & other insects 📍 in the Netherlands (introduced)
Western Conifer Seed Bug, photo 1 of 9
1/9 © Holger Krisp · CC BY 4.0

what is it?

The western conifer seed bug , Leptoglossus occidentalis , sometimes 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 and Nevada) but has in recent times expanded its range to eastern North America, and has become an invasive species in parts of Europe.

base stats

  • NL sightings 1,022iNaturalist, research grade
  • worldwide 98,091iNaturalist observations

Bars compare against all animals on log scales: up to 300,000 Dutch and 600,000 worldwide sightings (the most-seen species), 150 t (blue whale), 30 m and 400 years (Greenland shark).

fun facts

  • Spotted 1,022 times in the Netherlands on iNaturalist: the #8 most seen of the bugs, crickets & other insects in NL.
  • 98,091 observations worldwide on iNaturalist.
  • Scientifically named by Otto Heidemann in 1910 (116 years ago).
  • Not originally Dutch: it was introduced to the Netherlands.

fact sheet

English
Western Conifer Seed Bug
Nederlands
Bladpootrandwants
scientific name
Leptoglossus occidentalis
class
Insecta
order
Hemiptera
family
Coreidae
in NL
introduced
sightings in NL
1,022
sightings in Europe
35,447
sightings worldwide
98,091
GBIF records in NL
34,487
weight
—
length
—
lifespan
—
named
1910 by Otto Heidemann

relatives· Coreidae

Sources: iNaturalist taxon 67771, Wikidata Q468719, GBIF 5156102, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.

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