Thryogenes nereis
VU

Thryogenes nereis

Unknown

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Thryogenes_nereis

Overview

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

Thryogenes nereis faces significant pressure from agricultural intensification and habitat fragmentation across its Scandinavian range. The species' specialized feeding requirements on specific sedge communities make it particularly vulnerable to changes in wetland management practices. Climate-driven shifts in precipitation patterns are altering the hydrology of its preferred bog and fen habitats, while increased nitrogen deposition from agricultural runoff degrades the oligotrophic conditions this weevil requires.

Threat summary

Habitat

This specialized weevil inhabits nutrient-poor wetlands including sphagnum bogs, sedge fens, and marshy areas with specific Carex sedge species. It requires stable water levels and oligotrophic conditions typical of undisturbed northern European peatlands.

Other threatened species in Brachyceridae

VU

Grypus brunnirostris

Unknown

Threatened in Austria

VU

Lepiota echinella

Unknown
EN

Lyophyllum deliberatum

Unknown
VU

Large Tree-chernes

Dendrochernes cyrneus

Unknown
EN

Pipizella nigriana

Unknown

Frequently asked questions

Why is Thryogenes nereis classified as Vulnerable?
Thryogenes nereis is classified as Vulnerable because the population is declining and the species faces a high risk of extinction in the medium-term future if current pressures continue. Thryogenes nereis faces significant pressure from agricultural intensification and habitat fragmentation across its Scandinavian range. The species' specialized feeding requirements on specific sedge communities make it particularly vulnerable to changes in wetland management practices. Climate-driven shifts in precipitation patterns are altering the hydrology of its preferred bog and fen habitats, while increased nitrogen deposition from agricultural runoff degrades the oligotrophic conditions this weevil requires.
Where does Thryogenes nereis live?
Thryogenes nereis occurs in Austria, Belgium, Bulgaria, Denmark, Estonia, and Finland (plus 13 other countries). Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Thryogenes nereis?
The main threats to Thryogenes nereis 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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