CR

Sow-thistle Sawfly

Tenthredo neobesa

Unknown

Overview

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

Tenthredo neobesa faces severe population decline due to the destruction of its specialized montane forest habitat through logging and agricultural conversion. The species' extremely limited range makes it particularly vulnerable to localized habitat disturbances, while climate change threatens to shift suitable temperature and moisture conditions beyond its narrow altitudinal preferences. Its dependence on specific host plants for larval development means that even small-scale vegetation changes can eliminate breeding opportunities across its restricted distribution.

Threat summary

Habitat

Tenthredo neobesa inhabits montane deciduous and mixed forests at elevations between 800-1,400 meters, where it depends on specific understory vegetation for larval development. The species requires intact forest canopy cover and is associated with areas containing its preferred host plants in the rose family.

Threatened in Åland Islands

Scarce BlackneckCR

Scarce Blackneck

Lygephila craccae

Unknown
EN

Dolichopus notatus

Unknown
Haplodrassus cognatusCR

Haplodrassus cognatus

Unknown
Yellow-breasted BuntingCR

Yellow-breasted Bunting

Emberiza aureola

Declining

Frequently asked questions

Why is Sow-thistle Sawfly classified as Critically Endangered?
Sow-thistle Sawfly is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Tenthredo neobesa faces severe population decline due to the destruction of its specialized montane forest habitat through logging and agricultural conversion. The species' extremely limited range makes it particularly vulnerable to localized habitat disturbances, while climate change threatens to shift suitable temperature and moisture conditions beyond its narrow altitudinal preferences. Its dependence on specific host plants for larval development means that even small-scale vegetation changes can eliminate breeding opportunities across its restricted distribution.
Where does Sow-thistle Sawfly live?
Sow-thistle Sawfly occurs in Åland Islands, Albania, Austria, Belgium, Bulgaria, and Croatia (plus 26 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 Sow-thistle Sawfly?
The main threats to Sow-thistle Sawfly 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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