groene didea
Didea alneti
The groene didea (Didea alneti) is a distinctive green-colored dipteran fly species with metallic sheen on its thorax and characteristic hover-flight behavior. This specialized pollinator plays a crucial ecological role in maintaining plant diversity within riparian ecosystems, particularly serving as a key pollinator for several rare flowering plants in alder-dominated wetlands.
31
Countries
Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Didea_alneti
Taxonomy & Classification
Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Diptera
Family
Syrphidae
Genus
Didea
groene didea belongs to the family Syrphidae, order Diptera, within the Insecta class.
Species Profile
The groene didea (Didea alneti) is a distinctive green-colored dipteran fly species with metallic sheen on its thorax and characteristic hover-flight behavior. This specialized pollinator plays a crucial ecological role in maintaining plant diversity within riparian ecosystems, particularly serving as a key pollinator for several rare flowering plants in alder-dominated wetlands.
Didea alneti faces severe population decline primarily due to habitat loss from deforestation and agricultural expansion in its limited range. Climate change is altering the species' specialized ecosystem requirements, while invasive species compete for resources and disrupt native food webs.
Key Facts
Habitat & Distribution
This species inhabits the understory of mature alder (Alnus) forests along slow-moving streams and river margins, particularly in areas with high humidity and dappled sunlight. It requires specific microhabitats with decaying organic matter near water sources for larval development and adjacent wildflower meadows for adult feeding.
Threats
IUCN Red List: Critically Endangered
Didea alneti faces severe population decline primarily due to habitat loss from deforestation and agricultural expansion in its limited range. Climate change is altering the species' specialized ecosystem requirements, while invasive species compete for resources and disrupt native food webs.
Agricultural expansion
Habitat loss and fragmentation
Small population size and genetic bottlenecks
Climate change impacts
Invasive species competition
Found in 31 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 |
| 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). groene didea (Didea alneti). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/groene-didea