Machimus gonatistes
CR

Machimus gonatistes

Local name: Gul skægrovflue

Unknown

Photo: Photo: (c) Marcello Consolo, some rights reserved (CC BY-NC-SA)

Overview

Gul skægrovflue (Machimus gonatistes) is a large, robust robber fly characterized by its distinctive yellow coloration and prominent bristly 'beard' of setae around the face. As an apex aerial predator, this species plays a crucial role in controlling populations of other flying insects, including flies, bees, and beetles, which it captures during dramatic mid-air hunts.

Machimus gonatistes, a robber fly species, faces severe population decline primarily due to habitat loss and degradation of its specialized coastal and sandy habitat requirements. The species has an extremely limited distribution range, making it highly vulnerable to local environmental changes and human disturbance. Climate change and coastal development further threaten the remaining suitable habitats.

Threat summary

Habitat

Machimus gonatistes inhabits sun-exposed, extensively grazed grasslands and heathlands with scattered shrubs and abundant wildflowers. The species requires areas with bare ground patches for territorial perching combined with diverse flowering plants that attract the wide variety of prey insects essential for its survival.

Frequently asked questions

Why is Gul skægrovflue classified as Critically Endangered?
Gul skægrovflue is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Machimus gonatistes, a robber fly species, faces severe population decline primarily due to habitat loss and degradation of its specialized coastal and sandy habitat requirements. The species has an extremely limited distribution range, making it highly vulnerable to local environmental changes and human disturbance. Climate change and coastal development further threaten the remaining suitable habitats.
Where does Gul skægrovflue live?
Gul skægrovflue occurs in Austria, Bulgaria, Croatia, Denmark, France, and Germany (plus 7 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 Gul skægrovflue?
The main threats to Gul skægrovflue 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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