Paragus constrictus
Local name: dynstäppblomfluga
Paragus constrictus is a species of hoverfly. It is found in Southern Sweden and Denmark, Ireland, Spain, Germany, the French Alps, Switzerland, Austria, Italy, Yugoslavia and Turkey and Russia east of the Urals.
18
Countries
Photo: iNaturalist: (c) o_beckett98, all rights reserved, uploaded by o_beckett98
Taxonomy & Classification
Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Diptera
Family
Syrphidae
Genus
Paragus
Paragus constrictus belongs to the family Syrphidae, order Diptera, within the Insecta class.
Species Profile
Paragus constrictus is a species of hoverfly. It is found in Southern Sweden and Denmark, Ireland, Spain, Germany, the French Alps, Switzerland, Austria, Italy, Yugoslavia and Turkey and Russia east of the Urals. This species may be distinguished from Paragus tibialis only by the shape of the male parameres. In both sexes it shares with P. tibialis the character of entirely pale-haired abdominal tergites, so it is distinct from Paragus haemorrhous which has dark hairs. Images representing Paragus constrictus
Paragus constrictus faces significant threats from habitat loss and degradation due to agricultural intensification and urbanization across its range. The species' dependence on specific flowering plants for nectar and particular host plants for larval development makes it particularly vulnerable to changes in plant community composition and the widespread use of pesticides.
Key Facts
Habitat & Distribution
This hoverfly species inhabits flower-rich grasslands, meadows, and agricultural margins, particularly favoring areas with diverse wildflower communities and traditional extensive farming systems. Adults require nectar sources from various flowering plants while larvae develop as predators of aphids on herbaceous vegetation.
Threats
Habitat loss from agricultural intensification
Pesticide use affecting both adults and prey species
Climate change altering flowering phenology
Loss of traditional extensive farming practices
Urban development fragmenting suitable habitats
Found in 18 Countries
National vs Global Threat Status
How this species is assessed at the national level compared to its IUCN global status (VU).
| Country | National Status | Global Status | Comparison |
|---|---|---|---|
| EU | ENEndangered | VUVulnerable | Higher local risk |
| EU | ENEndangered | VUVulnerable | Higher 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). Paragus constrictus (Paragus constrictus). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/dynstappblomfluga