VU

Hercostomus gracilis

Unknown

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Hercostomus gracilis faces significant pressure from agricultural intensification and wetland drainage across its limited range. The species' dependence on specific moisture conditions in riparian zones makes it particularly vulnerable to hydrological changes from irrigation projects and water extraction. Urban development and industrial activities near waterways have further fragmented suitable habitat patches.

Threat summary

Habitat

This dolichopodid fly inhabits moist riparian environments, particularly areas with soft sediments and organic debris along stream margins and wetland edges. The species requires specific microhabitat conditions with consistent moisture levels and suitable substrate for larval development.

TERRESTRIAL· major

Other threatened species in Dolichopodidae

EN

Dolichopus notatus

Unknown
VU

Dolichopus lancearius

Unknown
VU

Chrysotus laesus

Unknown
VU

Thinophilus flavipalpis

Unknown

Threatened in Denmark

VU

Lepiota echinella

Unknown
EN

Lyophyllum deliberatum

Unknown
Scarce BlackneckCR

Scarce Blackneck

Lygephila craccae

Unknown
Common Fire SalamanderVU

Common Fire Salamander

Salamandra salamandra

Declining

Frequently asked questions

Why is Hercostomus gracilis classified as Vulnerable?
Hercostomus gracilis is classified as Vulnerable because the population is declining and the species faces a high risk of extinction in the medium-term future if current pressures continue. Hercostomus gracilis faces significant pressure from agricultural intensification and wetland drainage across its limited range. The species' dependence on specific moisture conditions in riparian zones makes it particularly vulnerable to hydrological changes from irrigation projects and water extraction. Urban development and industrial activities near waterways have further fragmented suitable habitat patches.
Where does Hercostomus gracilis live?
Hercostomus gracilis occurs in Denmark, France, Germany, Netherlands, Spain, and Sweden (plus 2 other countries). Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Hercostomus gracilis?
The main threats to Hercostomus gracilis are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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