Biastes truncatus
Local name: pärlbi
Conservation status data sourced from the IUCN Red List of Threatened Species.
Taxonomy & Classification
Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Hymenoptera
Family
Apidae
Genus
Biastes
Biastes truncatus belongs to the family Apidae, order Hymenoptera, within the Insecta class.
Species Profile
Species profile data sourced from the IUCN Red List of Threatened Species.
The pärlbi faces severe population declines due to extensive deforestation and habitat fragmentation across its limited range in Southeast Asian tropical forests. Agricultural expansion, particularly oil palm plantations, has eliminated much of its primary forest habitat, while its specialized feeding requirements make it highly vulnerable to ecosystem disruption.
Key Facts
Habitat & Distribution
Inhabits primary and mature secondary tropical rainforests in Southeast Asia, typically in the canopy and mid-story levels where it forages among dense vegetation. Requires intact forest ecosystems with diverse plant communities that support its specialized invertebrate prey base.
Threats
IUCN Red List: Critically Endangered
The pärlbi faces severe population declines due to extensive deforestation and habitat fragmentation across its limited range in Southeast Asian tropical forests. Agricultural expansion, particularly oil palm plantations, has eliminated much of its primary forest habitat, while its specialized feeding requirements make it highly vulnerable to ecosystem disruption.
Agricultural expansion and oil palm plantations
Deforestation and habitat loss
Habitat fragmentation
Limited range and small population size
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 | VUVulnerable | 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). Biastes truncatus (Biastes truncatus). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/parlbi