Bavius Blue
Pseudophilotes bavius
Pseudophilotes bavius, the Bavius blue, is a butterfly of the family Lycaenidae. It is found in Morocco, Algeria, Bulgaria, Romania, Greece, Asia Minor, southern Russia and northern Kazakhstan.
Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Pseudophilotes_bavius
Taxonomy & Classification
Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Lepidoptera
Family
Lycaenidae
Genus
Pseudophilotes
Bavius Blue belongs to the family Lycaenidae, order Lepidoptera, within the Insecta class.
Species Profile
Pseudophilotes bavius, the Bavius blue, is a butterfly of the family Lycaenidae. It is found in Morocco, Algeria, Bulgaria, Romania, Greece, Asia Minor, southern Russia and northern Kazakhstan. The species occurs in small isolated populations on flower-rich, dry grassland, on dry, stony slopes and on open patches in shrub and in vineyards on calcareous soil.
The Bavius Blue butterfly faces severe population declines primarily due to habitat loss and degradation of its specialized Mediterranean scrubland ecosystems. Agricultural intensification, urban development, and changes in traditional land management practices have fragmented and destroyed the specific host plant communities this species depends on for reproduction.
Key Facts
Threats
IUCN Red List: Critically Endangered
The Bavius Blue butterfly faces severe population declines primarily due to habitat loss and degradation of its specialized Mediterranean scrubland ecosystems. Agricultural intensification, urban development, and changes in traditional land management practices have fragmented and destroyed the specific host plant communities this species depends on for reproduction.
Agricultural intensification
Habitat loss and fragmentation
Urban development and infrastructure
Climate change impacts on host plants
Loss of traditional grazing practices
National vs Global Threat Status
How this species is assessed at the national level compared to its IUCN global status (CR).
| Country | National Status | Global Status | Comparison |
|---|---|---|---|
| EU | LCLeast Concern | CRCritically Endangered | Lower local risk |
| EU | LCLeast Concern | CRCritically Endangered | Lower local risk |
National Red List data sourced from the National Red List Project (nationalredlist.org, ZSL) and country-specific Red List authorities.
Community Sightings
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Sources & Attribution
How to Cite
IUCN: IUCN (2025). The IUCN Red List of Threatened Species. Version 2025-1. Available at: https://www.iucnredlist.org. doi:10.2305/IUCN.UK.2025-1.RLTS
GBIF: GBIF.org (2025). GBIF Home Page. Available at: https://www.gbif.org
National Red Lists: ZSL (2025). National Red List. Zoological Society of London. Available at: https://www.nationalredlist.org
This page: SpeciesRadar (2025). Bavius Blue (Pseudophilotes bavius). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/bavius-blue