Unio crassus Phillipsson, 1788
|Threat status Europe||Vulnerable (IUCN)|
|EU conservation status by biogeographical region||Alpine - Unfavourable-Inadequate|
|Atlantic - Unfavourable-Bad|
|Black Sea - Unknown|
|Boreal - Unfavourable-Inadequate|
|Continental - Unfavourable-Bad|
|Mediterranean - Unknown|
|Pannonian - Unfavourable-Inadequate|
|Protected by||EU Habitats Directive and 1 other international agreement|
|Natura 2000 sites||818 are designated for this species|
|Most preferred habitats||
|Natura 2000 species code||1032|
Threat and conservation status
IUCN Red List status of threatened species
The IUCN Red List threat status assesses the risk of extinction.
EU conservation status
Conservation status assesses every six years and for each biogeographical region the condition of habitats and species compared to the favourable status as described in the Habitats Directive. The map shows the 2007-2012 assessments as reported by EU Member State. Assessments are further detailed in the summary document available behind the link below.
Natura 2000 sites
Protected in the following Natura 2000 sites
Protected sitesPlease note the site map takes a while to display.
Mentioned in the following international legal instruments and agreements
Common names and synonyms
|Fauna Europaea search||Fauna Europaea|
|GBIF||Global Biodiversity Information Facility|
|Habitats Directive Art. 17-2006 summary|
|ITIS search||Interagency Taxonomic Information System|
|NCBI search||National Center for Biotechnology Information|
Files delivered through Reportnet with relevance to this species.