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Scolytus triarmatus

Unknown

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Scolytus triarmatus faces severe population decline primarily due to the widespread loss and degradation of mature elm forests across its range. The species' specialized dependence on large, healthy elm trees makes it particularly vulnerable to Dutch elm disease, which has devastated elm populations throughout Europe. Urban development and intensive forestry practices have further reduced suitable breeding habitat, while climate change may be altering the distribution and health of its host trees.

Threat summary

Habitat

This bark beetle species inhabits mature elm forests and woodland edges where it breeds exclusively in the bark and wood of elm trees (Ulmus species). The species requires large, healthy or recently dead elm trees for successful reproduction and larval development.

Frequently asked questions

Why is Scolytus triarmatus classified as Endangered?
Scolytus triarmatus is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. Scolytus triarmatus faces severe population decline primarily due to the widespread loss and degradation of mature elm forests across its range. The species' specialized dependence on large, healthy elm trees makes it particularly vulnerable to Dutch elm disease, which has devastated elm populations throughout Europe. Urban development and intensive forestry practices have further reduced suitable breeding habitat, while climate change may be altering the distribution and health of its host trees.
Where does Scolytus triarmatus live?
Scolytus triarmatus occurs in Austria, Denmark, Estonia, and Sweden. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Scolytus triarmatus?
The main threats to Scolytus triarmatus are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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