VU

franscitronbi

Hylaeus difformis

UnknownLCEU

Overview

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

Hylaeus difformis faces significant pressure from habitat degradation and fragmentation of its specialized nesting sites in coastal and semi-arid environments. The species' narrow ecological requirements make it particularly vulnerable to land-use changes, urban development, and agricultural intensification. Climate change poses additional risks through altered precipitation patterns that could affect the plant communities this bee depends on for foraging and nesting substrate.

Threat summary

Habitat

This specialized bee inhabits coastal scrublands, semi-arid grasslands, and open woodlands where it nests in hollow plant stems and dead wood. The species shows strong preference for areas with diverse native flowering plants and requires specific microhabitat conditions for successful reproduction.

Other threatened species in Colletidae

Margined ColletesVU

Margined Colletes

Colletes marginatus

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VU

Colletes dimidiatus

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Northern ColletesCR

Northern Colletes

Colletes floralis

Unknown
Colletid beeCR

Colletid bee

Hylaeus pictipes

Unknown

Threatened in Austria

Calidris ferrugineaVU

Calidris ferruginea

Declining
Anthophore estivaleCR

Anthophore estivale

Anthophora aestivalis

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Adonis BlueVU

Adonis Blue

Lysandra bellargus

Unknown
agnhodeedderkoppCR

agnhodeedderkopp

Walckenaeria alticeps

Unknown

Frequently asked questions

Why is franscitronbi classified as Vulnerable?
franscitronbi 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. Hylaeus difformis faces significant pressure from habitat degradation and fragmentation of its specialized nesting sites in coastal and semi-arid environments. The species' narrow ecological requirements make it particularly vulnerable to land-use changes, urban development, and agricultural intensification. Climate change poses additional risks through altered precipitation patterns that could affect the plant communities this bee depends on for foraging and nesting substrate.
Where does franscitronbi live?
franscitronbi occurs in Austria, Belgium, Bulgaria, Czechia, Estonia, and France (plus 19 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 franscitronbi?
The main threats to franscitronbi 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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