Pale Eggar
EN

Pale Eggar

Trichiura crataegi

Unknown

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

Overview

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

The Pale Eggar faces severe population decline primarily due to habitat loss from agricultural intensification and urban development across its European range. Climate change poses an additional threat by altering the phenology of its host plants, particularly hawthorn and blackthorn, disrupting the synchronization between larval emergence and food availability. The species' specialized habitat requirements for scrubland and woodland edges make it particularly vulnerable to landscape fragmentation.

Threat summary

Habitat

The Pale Eggar inhabits scrubland, woodland edges, and hedgerows where its larval host plants including hawthorn, blackthorn, and wild cherry are abundant. It requires a mosaic of open areas and shrubby vegetation, typically found in traditional agricultural landscapes and forest margins across temperate Europe.

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Frequently asked questions

Why is Pale Eggar classified as Endangered?
Pale Eggar 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. The Pale Eggar faces severe population decline primarily due to habitat loss from agricultural intensification and urban development across its European range. Climate change poses an additional threat by altering the phenology of its host plants, particularly hawthorn and blackthorn, disrupting the synchronization between larval emergence and food availability. The species' specialized habitat requirements for scrubland and woodland edges make it particularly vulnerable to landscape fragmentation.
Where does Pale Eggar live?
Pale Eggar occurs in Åland Islands, Andorra, Austria, Belarus, Belgium, and Bulgaria (plus 31 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 Pale Eggar?
The main threats to Pale Eggar 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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