#3949 · 🦗 bugs, crickets & other insects
Western Conifer Seed Bug
🇳🇱 Bladpootrandwants ·Leptoglossus occidentalis
9 photos from iNaturalist (Creative Commons) · credits & licences
- 1. © Holger Krisp · CC BY 4.0
- 2. © Wildlife in a Dorset garden. · CC BY-NC-SA 4.0
- 3. © SilverBack82 · CC BY-NC-SA 4.0
- 4. © Léo-Guy de Repentigny · CC BY-NC 4.0
- 5. © ermell · CC BY-SA 4.0
- 6. © Mehmet Akif Suna · CC BY-NC 4.0
- 7. © Léo-Guy de Repentigny · CC BY-NC 4.0
- 8. © Chris Moody · CC BY-NC 4.0
- 9. © Chris Moody · CC BY-NC 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
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
#3944 📷 10Dock Bug
🇳🇱 Zuringrandwants
Coreus marginatus
👀 1.5k in NL
#3956 📷 10Box Bug
🇳🇱 Smalle randwants
Gonocerus acuteangulatus
👀 519 in NL
#4040 📷 10Rhombic Leatherbug
🇳🇱 Ruitrandwants
Syromastus rhombeus
👀 68 in NL
#4172 📷 8Acanthocephala terminalis
Acanthocephala terminalis
🌍 53.4k seen
#4184 📷 7Eastern Leaf-footed Bug
Leptoglossus phyllopus
🌍 27.8k seen
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.
