Ramson's Hoverfly
VU

Ramson's Hoverfly

Portevinia maculata

UnknownLCEULCEU

Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Portevinia_maculata

Overview

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

Ramson's Hoverfly faces severe habitat loss due to the decline of ancient woodland and traditional woodland management practices across its limited European range. The species' dependence on specific microhabitats within old-growth forests makes it particularly vulnerable to forestry intensification and fragmentation. Climate change poses an additional threat by altering the delicate moisture and temperature conditions required for its larval development in decaying wood.

Threat summary

Habitat

Ramson's Hoverfly inhabits ancient deciduous woodlands, particularly beech and oak forests with abundant dead wood and fallen logs. The species requires specific microhabitats within these forests, including shaded areas with high humidity and decaying wood substrates where larvae can develop.

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Frequently asked questions

Why is Ramson's Hoverfly classified as Vulnerable?
Ramson's Hoverfly 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. Ramson's Hoverfly faces severe habitat loss due to the decline of ancient woodland and traditional woodland management practices across its limited European range. The species' dependence on specific microhabitats within old-growth forests makes it particularly vulnerable to forestry intensification and fragmentation. Climate change poses an additional threat by altering the delicate moisture and temperature conditions required for its larval development in decaying wood.
Where does Ramson's Hoverfly live?
Ramson's Hoverfly occurs in Australia, Austria, Belgium, Czechia, Denmark, and France (plus 10 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 Ramson's Hoverfly?
The main threats to Ramson's Hoverfly 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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