Bull-headed Sweat Bee
Lasioglossum zonulum
Lasioglossum zonulus is a species of sweat bee in the family Halictidae. It is found in Europe and North America.
38
Countries
Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Lasioglossum_zonulus
Taxonomy & Classification
Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Hymenoptera
Family
Halictidae
Genus
Lasioglossum
Bull-headed Sweat Bee belongs to the family Halictidae, order Hymenoptera, within the Insecta class.
Species Profile
Lasioglossum zonulus is a species of sweat bee in the family Halictidae. It is found in Europe and North America. While the name has historically been misspelled "zonulum", the original name, zonulus, is a noun and does not change spelling under Article 31 of the ICZN, and some sources have recognized this and adopted the correct spelling.
The Bull-headed Sweat Bee faces severe population declines primarily due to habitat loss from urban development and agricultural intensification in its limited range. Climate change and the use of pesticides in agricultural areas further threaten the remaining populations of this specialized bee species.
Key Facts
Threats
IUCN Red List: Endangered
The Bull-headed Sweat Bee faces severe population declines primarily due to habitat loss from urban development and agricultural intensification in its limited range. Climate change and the use of pesticides in agricultural areas further threaten the remaining populations of this specialized bee species.
Agricultural intensification and land conversion
Habitat loss from urban development
Small population size and limited range
Climate change impacts on habitat suitability
Pesticide use in agricultural areas
Found in 38 Countries
National vs Global Threat Status
How this species is assessed at the national level compared to its IUCN global status (EN).
| Country | National Status | Global Status | Comparison |
|---|---|---|---|
| EU | LCLeast Concern | ENEndangered | 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). Bull-headed Sweat Bee (Lasioglossum zonulum). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/bull-headed-sweat-bee