guldsmalbi
Lasioglossum aeratum
Lasioglossum aeratum, commonly known as guldsmalbi, is a small metallic sweat bee characterized by its distinctive bronze-green sheen and compact body typical of the Lasioglossum genus. This solitary to semi-social bee plays a crucial role as a pollinator of wildflowers and agricultural crops in its native range, with females constructing ground nests in sandy or clay soils.
34
Countries
Taxonomy & Classification
Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Hymenoptera
Family
Halictidae
Genus
Lasioglossum
guldsmalbi belongs to the family Halictidae, order Hymenoptera, within the Insecta class.
Species Profile
Lasioglossum aeratum, commonly known as guldsmalbi, is a small metallic sweat bee characterized by its distinctive bronze-green sheen and compact body typical of the Lasioglossum genus. This solitary to semi-social bee plays a crucial role as a pollinator of wildflowers and agricultural crops in its native range, with females constructing ground nests in sandy or clay soils.
Lasioglossum aeratum, known as the guldsmalbi, faces severe population decline primarily due to habitat loss and degradation of its specialized nesting sites. This solitary bee species has extremely limited distribution and is highly vulnerable to environmental changes affecting its host plants and nesting substrate. Climate change and human development pressures continue to fragment and reduce the quality of remaining suitable habitat.
Key Facts
Habitat & Distribution
Guldsmalbi inhabits open grasslands, meadows, and agricultural margins with exposed sandy or clay soils suitable for ground nesting. The species requires diverse flowering plant communities within close proximity to nesting areas, particularly favoring areas with sparse vegetation cover that facilitate nest construction.
Threats
IUCN Red List: Critically Endangered
Lasioglossum aeratum, known as the guldsmalbi, faces severe population decline primarily due to habitat loss and degradation of its specialized nesting sites. This solitary bee species has extremely limited distribution and is highly vulnerable to environmental changes affecting its host plants and nesting substrate. Climate change and human development pressures continue to fragment and reduce the quality of remaining suitable habitat.
Agricultural intensification
Habitat loss and fragmentation
Loss of floral resources
Climate change impacts
Small population size and genetic bottlenecks
Found in 34 Countries
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 |
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). guldsmalbi (Lasioglossum aeratum). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/guldsmalbi